... heading and stall system 房柱式开采法 heading assembly 掘进机械 heading blast 阶段爆破;超前工祖爆破;硐室爆破 ...
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heading g assembly 掘进机械
rock heading machine assembly 岩巷掘进机械化作业线
Then the assembly adjourned, with many of the politicians heading off to a garden party at Mr Hain's Hillsborough Castle residence.
BBC: NEWS | UK | Northern Ireland | NI politicians return to Stormont
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