false roof的意思|示意

The roof slice longwall method increases the work of laying false roof for next slice.

长壁采煤法的采煤工艺具有多重特点:顶分层采煤增加了要为下分层填设假顶的工作.

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In slicing seams, bolt supporting was utilized under false roof and obtained good result.

介绍在分层开采煤层中, 在假顶条件下实现锚杆支护.

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The man - made false roof quality is very important to the mine pIt'safety in production.

人工假顶的质量对矿井的安全生产至关重要.

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