英语词汇“pilot hole of shaft”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	pilot hole of shaft
释义	pilot hole of shaft 井筒检查孔；新井开凿前；为核实井筒剖面资料,编制施工设计方案,
随便看	ring isomerization ring isomorphism ringite ringite pegmatite ringite pogmatite Ringius ring jewel ring job ring joint ring-joint ring joint flange ring joint gasket ring joints ring joint seal ring joint welding neck flange ringjonit gasket ring jumbo ring junction ringk Ringk ringkasan ring ketone ring key ring kiln ring klin