... 井筒横梁：shaft bunton 井筒罐道：pit guide 井筒隔间：shaft compartment ...
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... 井筒隔间 shaft compartment 井筒罐道 shaft guide 井筒横梁 biat ...
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自1994年开发推广以来，冷弯方管罐道已在300多个矿井井筒安装使用。
The shaft guide is our patent product protected by intellectual property law, and it has been adopted in over 300 mines since 1994.
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