The principles and stipulations for the allocation of explosion-proof electrical and mechanical equipment for tunnels in gas-containing ground should be further clarified and improved.
进一步明确和改进瓦斯隧道机电设备防爆性配备的原则和相关条款。
The principles and stipulations for the allocation of explosion-proof electrical and mechanical equipment for tunnels in gas-containing ground should be further clarified and improved.
进一步明确和改进瓦斯隧道机电设备防爆性配备的原则和相关条款。
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