青云翻译

5.5.3 cable tray, cable trench, through the different levels of protection pipe explosion fire risk areas, should be taken in isolation boundary between sealing measures.

5.5.3 cable bridges, cable trench, when protection tube through different-level explosion fire hazardous areas, isolation seal measures should be taken at the boundaries.

5.5.3 When electric cable bridge, cable trench, tube protector through different rank detonation fire risk region, should take the isolation seal measure in the dividing line place.

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5.5.3 cable bridges, cable trench, when protection tube through different-level explosion fire hazardous areas, isolation seal measures should be taken at the boundaries.