试用视觉搜索
使用图片进行搜索,而不限于文本
你提供的照片可能用于改善必应图片处理服务。
隐私政策
|
使用条款
在此处拖动一张或多张图像或
浏览
在此处放置图像
或
粘贴图像或 URL
拍照
单击示例图片试一试
了解更多
要使用可视化搜索,请在浏览器中启用相机
English
全部
图片
灵感
创建
集合
视频
地图
资讯
购物
更多
航班
旅游
酒店
搜索
笔记本
自动播放所有 GIF
在这里更改自动播放及其他图像设置
自动播放所有 GIF
拨动开关以打开
自动播放 GIF
图片尺寸
全部
小
中
大
特大
至少... *
自定义宽度
x
自定义高度
像素
请为宽度和高度输入一个数字
颜色
全部
仅限颜色
黑白
类型
全部
照片
剪贴画
素描
动画 GIF
透明
版式
全部
方形
横版
竖版
人物
全部
仅脸部
半身像
日期
全部
过去 24 小时
过去一周
过去一个月
去年
授权
全部
所有创作共用
公共领域
免费分享和使用
在商业上免费分享和使用
免费修改、分享和使用
在商业上免费修改、分享和使用
详细了解
清除筛选条件
安全搜索:
中等
严格
中等(默认)
关闭
筛选器
购买 ethernet controlled power switch
赞助
$965.15
Cisco C9300-24UX-A
Industrial Automation Co.
Free shipping
$965.15
Cisco C9300-24UX-A
Industrial Automation Co.
Free shipping
$995.00
Cisco Meraki MS120-48FP-HW
Industrial Automation Co.
Free shipping
$995.00
Cisco Meraki MS120-48FP-HW
Industrial Automation Co.
Free shipping
$1,691.50
HPE Aruba 2540 24G-Poe+ 4SFP+ Switch (JL356A)
Industrial Automation Co.
Free shipping
$1,691.50
HPE Aruba 2540 24G-Poe+ 4SFP+ Switch (JL356A)
Industrial Automation Co.
Free shipping
$189.00
Web Power Switch Pro Model
Amazon.com
302
Free shipping
$189.00
Web Power Switch Pro Model
Amazon.com
302
$160.00
Uswitch | Control Anything Anywhere Over The Web Or Network Relay Switch
uHaveControl
$160.00
Uswitch | Control Anything Anywhere Over The Web Or Network Relay Switch
uHaveControl
$99.95
Msnswitch2 Internet Enabled IP Remote Power Switch With Reboot - Control Via Smartphone App, Cloud Service, Web Browser, API, Skype Or Google Chat -
Amazon.com
281
Free shipping
$99.95
Msnswitch2 Internet Enabled IP Remote Power Switch With Reboot - Control Via Smartphone App, Cloud Service, Web Browser, API, Skype Or Google Chat -
Amazon.com
281
$180.00
Uswitch Pro - User Customizable Ethernet GPIO Inputs With Control At The Push Of Any Button Relay Switch
uHaveControl
$180.00
Uswitch Pro - User Customizable Ethernet GPIO Inputs With Control At The Push Of Any Button Relay Switch
uHaveControl
$79.95
Ezoutlet5 - Internet Enabled IP & Wi-Fi Remote Power Switch With Automatic Reboot - Ios | Android | Cloud | Web Controllable - Single AC Power
Amazon.com
290
Free shipping
$79.95
Ezoutlet5 - Internet Enabled IP & Wi-Fi Remote Power Switch With Automatic Reboot - Ios | Android | Cloud | Web Controllable - Single AC Power
Amazon.com
290
$265.00
Uswitch CS - Wifi/Ethernet Web Controlled Relays And I/O Uswitch CS Relay Switch
uHaveControl
$265.00
Uswitch CS - Wifi/Ethernet Web Controlled Relays And I/O Uswitch CS Relay Switch
uHaveControl
$278.34
Honeywell Home MSTN Power Open / Power Close Damper Actuator | Supplyhouse.Com
SupplyHouse.com
31
$278.34
Honeywell Home MSTN Power Open / Power Close Damper Actuator | Supplyhouse.Com
SupplyHouse.com
31
$116.00
PHOENIX CONTACT FL SWITCH SFNT 5TX - Computer & Networking Router Supplies
Radwell.com
$116.00
PHOENIX CONTACT FL SWITCH SFNT 5TX - Computer & Networking Router Supplies
Radwell.com
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
34
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
34
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
2
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
2
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
Free shipping
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
Free shipping
$186.00
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$186.00
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$199.82
Remote Ip Power Switch With Scheduled Cycling - Essential For Home Or
eBay
1
Free shipping
$199.82
Remote Ip Power Switch With Scheduled Cycling - Essential For Home Or
eBay
1
$17.49
Tp-Link 5-Port Gigabit Unmanaged Fan-Less Switch In Durable Metal Casing. Easily Expand Your Wired Network Using This Plug-And-Play, Power Saving, Tra
Walmart
In store
33
路边
$17.49
Tp-Link 5-Port Gigabit Unmanaged Fan-Less Switch In Durable Metal Casing. Easily Expand Your Wired Network Using This Plug-And-Play, Power Saving, Tra
Walmart
33
$0.79
KYOCERA AVX 109159002101916 CONN SSL PLUG 2POS 3mm SOLDER
DigiKey
30-day returns (most items)
$0.79
KYOCERA AVX 109159002101916 CONN SSL PLUG 2POS 3mm SOLDER
DigiKey
30-day returns
$8.78
$9.19
Ethernet Switch 1 To 4 High Speed 1000Mbps, Ethernet Switch With Power Cord For Cat5/5E/6/7/8 Cables Network Switch Ethernet For Connecting Up To 4
Temu US
5
$8.78
$9.19
Ethernet Switch 1 To 4 High Speed 1000Mbps, Ethernet Switch With Power Cord For Cat5/5E/6/7/8 Cables Network Switch Ethernet For Connecting Up To 4
Temu US
5
$1,748.99
Juniper EX3400-24T Ethernet Switch
CDW
$1,748.99
Juniper EX3400-24T Ethernet Switch
CDW
$6.99
Fvh UTP STP 2 in 1 Out 2 Ports Rj45 LAN CAT Network Switch Selector Internal External Networking Switcher Splitter Box
Walmart
Free shipping
$6.99
Fvh UTP STP 2 in 1 Out 2 Ports Rj45 LAN CAT Network Switch Selector Internal External Networking Switcher Splitter Box
Walmart
Free shipping
$89.99
TP-Link 10-Port Gigabit Desktop Switch TLSG1210P At ABT
Abt Electronics
229
Free shipping
$89.99
TP-Link 10-Port Gigabit Desktop Switch TLSG1210P At ABT
Abt Electronics
229
$266.11
PHOENIX CONTACT Switch Ethernet (1085255) FL SWITCH 1016N
TME.COM
$266.11
PHOENIX CONTACT Switch Ethernet (1085255) FL SWITCH 1016N
TME.COM
$1,719.99
Juniper EX2300 Ethernet Switch
CDW
$1,719.99
Juniper EX2300 Ethernet Switch
CDW
$157.99
NETGEAR 10/100/1000Mbps 8 Port RJ45 Switch
L-com Global Connectivity
116
$157.99
NETGEAR 10/100/1000Mbps 8 Port RJ45 Switch
L-com Global Connectivity
116
$670.43
HARTING Switch Poe Ethernet 24034051120
TME.COM
$670.43
HARTING Switch Poe Ethernet 24034051120
TME.COM
$24.99
TP-Link TL-SG605 5-Port Gigabit Desktop Switch
Target
Free shipping
$24.99
TP-Link TL-SG605 5-Port Gigabit Desktop Switch
Target
Free shipping
$317.83
TCSESU051F0 Schneider Electric
WiAutomation US
$317.83
TCSESU051F0 Schneider Electric
WiAutomation US
$26.38
Switch 6 Port 100Mbps Ethernet Smart Switch 4 Poe+2 Uplink With Internal Power Office Network Hub For IP Camera
Walmart
Free shipping
$26.38
Switch 6 Port 100Mbps Ethernet Smart Switch 4 Poe+2 Uplink With Internal Power Office Network Hub For IP Camera
Walmart
Free shipping
$160.16
Advantech Corporation | Eki-2525-Be | Unmanaged Ethernet Switch, 5-Port 10/100Mbps | Network And Wireless - Switch
Kele
$160.16
Advantech Corporation | Eki-2525-Be | Unmanaged Ethernet Switch, 5-Port 10/100Mbps | Network And Wireless - Switch
Kele
$1,452.00
1044024 Phoenix Contact - Industrial Ethernet Switch - FL SWITCH 2208 PN | PLC Direct | Programmable Logic Controllers And Industrial Automation
PLC Direct
30-day returns (most items)
$1,452.00
1044024 Phoenix Contact - Industrial Ethernet Switch - FL SWITCH 2208 PN | PLC Direct | Programmable Logic Controllers And Industrial Automation
PLC Direct
30-day returns
$561.20
HARTING Switch Ethernet 24034070010
TME.COM
$561.20
HARTING Switch Ethernet 24034070010
TME.COM
展开
隐藏
1500×1000
advancedimagingparts.com
Ethernet Switch with power supply and power cord. 5270193
1600×1200
astrosurf.com
Ethernet Driven Switches
1024×1024
avertx.com
4 Channel Power Over Ethernet Switch - AvertX
1000×820
onvcom.com
Industrial Ethernet Switch
1024×768
howevision.com
Does an Ethernet Switch Require Power?
800×800
huaxin-tech.com
Wholesale Ethernet Switch Connection M…
899×1024
dngcorp.vn
Power Over Ethernet Switch_ …
720×600
stage60834f4d4.technica-engineering.com
Enhanced ethernet switch for Automotive Ethernet
1200×630
newequipment.com
Ethernet Switch | New Equipment Digest
747×926
indiamart.com
Power Over Ethernet Switc…
970×450
dngcorp.vn
Power Over Ethernet Switch_ Power Over Ethernet Switch_ SOLTECH ...
950×470
dngcorp.vn
Power Over Ethernet Switch_ Power Over Ethernet Switch_ SOLTECH ...
1920×900
cdatatec.com
Unmanaged Poe Ethernet/Network Switch | C-Data
购买 ethernet controlled power switch
赞助
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
34
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
2
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
Free shipping
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
$186.00
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$186.00
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
$199.82
Remote Ip Power Switch With Scheduled Cycling - Essential For Home Or
eBay
1
Free shipping
$199.82
Remote Ip Power Switch With Scheduled Cycling - Essential For Home Or
eBay
$17.49
Tp-Link 5-Port Gigabit Unmanaged Fan-Less Switch In Durable Metal Casing. Easily Expand Your Wired Network Using This Plug-And-Play, Power Saving, Tra
Walmart
In store
33
路边
$17.49
Tp-Link 5-Port Gigabit Unmanaged Fan-Less Switch In Durable Metal Casing. Easily Expand Your Wired Network Using This Plug-And-Play, Power Saving, Tra
Walmart
$0.79
KYOCERA AVX 109159002101916 CONN SSL PLUG 2POS 3mm SOLDER
DigiKey
30-day returns (most items)
$0.79
KYOCERA AVX 109159002101916 CONN SSL PLUG 2POS 3mm SOLDER
DigiKey
$8.78
$9.19
Ethernet Switch 1 To 4 High Speed 1000Mbps, Ethernet Switch With Power Cord For Cat5/5E/6/7/8 Cables Network Switch Ethernet For Connecting Up To 4
Temu US
5
$8.78
$9.19
Ethernet Switch 1 To 4 High Speed 1000Mbps, Ethernet Switch With Power Cord For Cat5/5E/6/7/8 Cables Network Switch Ethernet For Connecting Up To 4
Temu US
$1,748.99
Juniper EX3400-24T Ethernet Switch
CDW
$1,748.99
Juniper EX3400-24T Ethernet Switch
CDW
$6.99
Fvh UTP STP 2 in 1 Out 2 Ports Rj45 LAN CAT Network Switch Selector Internal External Networking Switcher Splitter Box
Walmart
Free shipping
$6.99
Fvh UTP STP 2 in 1 Out 2 Ports Rj45 LAN CAT Network Switch Selector Internal External Networking Switcher Splitter Box
Walmart
$89.99
TP-Link 10-Port Gigabit Desktop Switch TLSG1210P At ABT
Abt Electronics
229
Free shipping
$89.99
TP-Link 10-Port Gigabit Desktop Switch TLSG1210P At ABT
Abt Electronics
$266.11
PHOENIX CONTACT Switch Ethernet (1085255) FL SWITCH 1016N
TME.COM
$266.11
PHOENIX CONTACT Switch Ethernet (1085255) FL SWITCH 1016N
TME.COM
$1,719.99
Juniper EX2300 Ethernet Switch
CDW
$1,719.99
Juniper EX2300 Ethernet Switch
CDW
$157.99
NETGEAR 10/100/1000Mbps 8 Port RJ45 Switch
L-com Global Connectivity
116
$157.99
NETGEAR 10/100/1000Mbps 8 Port RJ45 Switch
L-com Global Connectivity
1000×820
onvcom.com
Gigabit 8-port Ethernet switch-Security Ethernet Switch
650×650
militaryethernet.com
PCB level Ethernet Switch, 1GE Managed 24-Port Ether…
760×570
selinc.com
New Ethernet Switch Expands on Predecessor Capabilities
4000×3641
bueno-electric.com
Managed Industrial Ethernet Switch - Bueno Electric
1200×630
automationworld.com
Cost-effective Ethernet Switch | Automation World
1400×900
theautomationblog.com
Choosing The Right Ethernet Switch | The Automation Blog
1978×1200
Stack Exchange
switches - Ethernet PHY/MAC/SWITCH IC available? - Electrical ...
1001×1001
blogspot.com
Power Over Ethernet Switch 6V-55V Power…
800×800
shuntaicompany.en.made-in-china.com
Industrial Ethernet Poe Power Supply Switch …
900×506
Electronics-Lab
BoxBlox's Open Source Ethernet Switch Offers Five Ports - Electronics ...
1200×675
viettuans.vn
Ethernet Switch là gì? Đặc điểm, chức năng, các loại Ethernet Switch
1256×756
embeddedcomputing.com
Power over Ethernet Switch Adds Network and Security Features for ...
1350×1350
onlinedocs.net
The Advantages Of An Ethernet …
900×803
conversiontech.en.made-in-china.com
Industrial-Grade Ethernet Switch wit…
1200×630
automationworld.com
Rugged, Low-power Ethernet Switches | Automation World
2592×1936
forums.hardwarezone.com.sg
Power adapter for ethernet switch - www.h…
1200×630
teltonika-networks.com
THE MAGIC AND POWER BEHIND ETHERNET SWITCHES | Teltonika
1600×1600
phynam.en.made-in-china.com
10/100/1000Mbps Ethernet Switch 8 Por…
600×554
securityexperts.pk
10 Port Fast Ethernet Switch With 8 PoE CPP…
1252×333
electronics.stackexchange.com
Ethernet switch IC ports in MAC and PHY mode - Electrical Engineering ...
800×713
iot-playground.com
Internet controlled switch
600×600
The Home Depot
Netgear 8-Port Gigabit Ethernet Unmanaged …
某些结果已被隐藏,因为你可能无法访问这些结果。
显示无法访问的结果
查看更多图片
购买 ethernet controlled power switch
赞助
$965.15
Cisco C9300-24UX-A
Industrial Automation Co.
Free shipping
$965.15
Cisco C9300-24UX-A
Industrial Automation Co.
Free shipping
$995.00
Cisco Meraki MS120-48FP-HW
Industrial Automation Co.
Free shipping
$995.00
Cisco Meraki MS120-48FP-HW
Industrial Automation Co.
Free shipping
$1,691.50
HPE Aruba 2540 24G-Poe+ 4SFP+ Switch (JL356A)
Industrial Automation Co.
Free shipping
$1,691.50
HPE Aruba 2540 24G-Poe+ 4SFP+ Switch (JL356A)
Industrial Automation Co.
Free shipping
$189.00
Web Power Switch Pro Model
Amazon.com
302
Free shipping
$189.00
Web Power Switch Pro Model
Amazon.com
302
$160.00
Uswitch | Control Anything Anywhere Over The Web Or Network Relay Switch
uHaveControl
$160.00
Uswitch | Control Anything Anywhere Over The Web Or Network Relay Switch
uHaveControl
$99.95
Msnswitch2 Internet Enabled IP Remote Power Switch With Reboot - Control Via Smartphone App, Cloud Service, Web Browser, API, Skype Or Google Chat -
Amazon.com
281
Free shipping
$99.95
Msnswitch2 Internet Enabled IP Remote Power Switch With Reboot - Control Via Smartphone App, Cloud Service, Web Browser, API, Skype Or Google Chat -
Amazon.com
281
$180.00
Uswitch Pro - User Customizable Ethernet GPIO Inputs With Control At The Push Of Any Button Relay Switch
uHaveControl
$180.00
Uswitch Pro - User Customizable Ethernet GPIO Inputs With Control At The Push Of Any Button Relay Switch
uHaveControl
$79.95
Ezoutlet5 - Internet Enabled IP & Wi-Fi Remote Power Switch With Automatic Reboot - Ios | Android | Cloud | Web Controllable - Single AC Power
Amazon.com
290
Free shipping
$79.95
Ezoutlet5 - Internet Enabled IP & Wi-Fi Remote Power Switch With Automatic Reboot - Ios | Android | Cloud | Web Controllable - Single AC Power
Amazon.com
290
$265.00
Uswitch CS - Wifi/Ethernet Web Controlled Relays And I/O Uswitch CS Relay Switch
uHaveControl
$265.00
Uswitch CS - Wifi/Ethernet Web Controlled Relays And I/O Uswitch CS Relay Switch
uHaveControl
$278.34
Honeywell Home MSTN Power Open / Power Close Damper Actuator | Supplyhouse.Com
SupplyHouse.com
31
$278.34
Honeywell Home MSTN Power Open / Power Close Damper Actuator | Supplyhouse.Com
SupplyHouse.com
31
$116.00
PHOENIX CONTACT FL SWITCH SFNT 5TX - Computer & Networking Router Supplies
Radwell.com
$116.00
PHOENIX CONTACT FL SWITCH SFNT 5TX - Computer & Networking Router Supplies
Radwell.com
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$215.00
PHOENIX CONTACT FL SWITCH SF 8TX - Computer & Networking Router Supplies
Radwell.com
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
34
$57.58
Honeywell Home RC840T-120 120V Relay W/ Built In 24V Transformer | Supplyhouse.Com
SupplyHouse.com
34
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$224.00
PHOENIX CONTACT FL SWITCH SFN 8TX-24VAC - Computer & Networking Router Supplies
Radwell.com
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
2
$63.95
ADJ PC-100A 8-Switch Rackmount Power Center 8-Outlet, 8-Switch Rackmount Power Center With Front-Panel 15A Circuit Breaker
Sweetwater
2
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$359.08
Johnson Controls S-2300-1 5 Port Switch - All Switching | Supplyhouse.Com
SupplyHouse.com
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$169.95
Ip 9258 Tp 4 Port Web Ac Power Switch Controller Remote Reboot Auto
eBay
Free shipping
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
Free shipping
$219.70
$236.60
Io Wireless Relay Kit
TruTech Tools
Free shipping
ethernet controlled power switch | Free Shipping w/ Prime
https://www.amazon.com › electronics › accessories
赞助
Find Deals on ethernet controlled power switch in Electronic Accessories on Amazon.
Explore Amazon Devices · Fast Shipping · Shop Our Huge Selection · Shop Best Sellers
Industrial Ethernet Switches - Stride
®
Switches
Learn More
https://www.automationdirect.com › communications
赞助
Shop VPN routers, IIoT bridges, Ethernet switches, media converters and Ethernet cables. AutomationDirect's industrial communication products provide reliable connectivity.
报告不当内容
请选择下列任一选项。
无关
低俗内容
成人
儿童性侵犯
反馈