Section 3 addresses switch card and mainframe considerations.
第3章着重介绍了开关卡和主机。
Connect an electrometer to the switch card output and measure the cur rent.
将一个静电计连接到开关卡输出并测量电流。
Install the switch card into the mainframe and allow the instruments to warm up.
将开关卡安装到主机上，并使仪器预热。
Refer to the switch card's operating manual for the specific procedures for that card.
关于开关卡的特定操作程序，请参阅开关卡的使用手册。
Section 3 provides a detailed description of switch card and mainframe specifications.
第3章详细介绍开关卡和主机的技术指标。
请重设卡上的开关。
请重设卡上的开关。
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