At both ends of conduit in non-explosion proof area, the bridging lines should welded or the earth wires should be connected with clamp.
非防爆区域内穿线管连接处两端，应焊接跨接线，或用接地线通过接地卡连接。
2
Endswelded: 40% of work and 60% of cumulative work.
管道焊接：40%的劳动量和60%的累计劳动量。
3
Furnace steel and steel plates were welded body constituted by the shell, and its both ends with heat-resistant material made of stainless steel pneumatic door.