In construction of signalling system in station, the station conduction test needs to be done to verify the correction of signallingequipment interlocking.
在车站信号工程的施工中，开通前都要进行车站联锁导通试验，以验证信号设备联锁的正确性。
2
Fixed railway installations. equipment for overhead telecommunication and signalling lines. plate for securing cross - pieces to reinforced concrete posts.
铁路固定设备。通讯和信号装置架空线路用器材。钢筋混凝土电杆上横梁固定用板。
3
Lead in solders for servers, storage and storage array systems, network infrastructure equipment for switching, signalling, transmission as well as network management for telecommunication.