Interface between carriers and customer installations - Analog voice grade switched access lines using loop - start and ground - start signaling.

电信公司和客户安装之间的接口,使用环路起始和地起始信令的 模拟话音 级交换访问线路.

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TRANSMISSION FLUID: With car on level ground, start the engine and check the dipstick.

变速箱油: 将车停于平地, 启动发动机,查看量油尺.

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