以电气接触为手段、以在线测试仪为代表的电气测试仪除了能够测试制造过程的缺陷和故障以外，还能够测试pcb的某些电气性能，因而得到了广泛的应用。

By contacting with PCB, electrical testers, such as in-circuit tester, not only can test most of manufacturing defects and faults, but also can test PCB assemblers' electrical performance.

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这个命令用于请求SCSI设备的基本信息，并且常常用作ping操作，以测试scsi设备是否在线。

This command is used to request the basic information of the SCSI device and is often used as a ping operation to test to see if the SCSI device is online.

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在线行李箱和手袋网站eBags 也做了提前测试，以确保网站能够承受在线星期一的访问量。

Online luggage and handbag site eBags also did testing ahead of time to make sure its site could handle Cyber Monday traffic.

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