Build stone runnel With the foundation of the bent overall basis.
排架与地基得连接采用整体基础。
A preliminary study on water sealing runnel drainage technology for gas drainage
水封式巷道瓦斯抽放技术探讨
They used waterproof cement to prevent water from seeping through the roof of the runnel.
他们采用防水水泥来阻止屋顶涓涓细流的渗漏。
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