pumping shaft 中文意思是什麼
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Device model experiments of shaft - well two - direction tubular pumping station
雙向豎井貫流泵站模型泵裝置模型試驗 -
Excavation blasting of gate shaft for a pumping energy - accumulated power station in luotian
抽水蓄能電站閘門豎井開挖爆破
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