The electric circuit in the work location should use steel-pipe laying wire and select explosion-proof electrical equipment.
工作场所内的电气线路应采用钢管布线，电气设备选用防爆型的。
Conventional measure to avoid the damage is to install explosion proof equipment in intake pipe besides decreasing valve overlap Angle.
为了避免这种危害，通常采取的办法除了减小气门重叠角外，就是在进气管安装防爆装置。
The steel pipe should not enter the junction box directly, and it should be connected to the box with explosion proof tie-in.
钢管不得直接进入接线盒，应通过防爆接头连接。
The steel pipe should not enter the junction box directly, and it should be connected to the box with explosion proof tie-in.
钢管不得直接进入接线盒，应通过防爆接头连接。
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