铁路设施。主干线机车车辆空调设备。第1部分：舒适度参数。
Railway applications - Air conditioning for main line rolling stock - Part 1: comfort parameters.
干线综合测试仪是对通信系统中的干线传输设备进行检测的仪器。
Trunk Tester is equipment that is used to test trunk transmission equipment of the communications system.
浙江西卡姆电力设备有限公司自主研发、生产的XKM/HYT系列主干线分线器是一种全新的作用于主干线上的专用分线低压电器件，是目前国内最先进的优质产品。
XKM/HYT series terminal block is an important component in low voltage electric equipment It is mainly applied for branching the trunk line, It is the most advanced terminal block in China at present.
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