Cable inlet for bottom elevated cover plate: the cover plate can be dismounted to drill holes and the seal rings are provided.
底部凸台盖板进线，盖板可预先拆下开孔，并配有密封圈。
Two types of water blocking device for the inlet of cable tunnel are developed, one is a profiled rubber seal and the other is a sealant seal.
开发了两种电缆隧道入口处堵水装置——成型橡胶件密封装置和密封膏密封装置。
Explosion-proof flexible connecting pipes is used in explosion-proof telephone station, explosion-proof terminal, explosion-proof loud-speaker inlet or outlet to conduit and protect the cable.
防爆挠线连接管用于防爆电话站、防爆接线箱、防爆扬声器的输入，输出口到布线钢管之间的过渡连接，起到保护电缆的作用。
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