drift bolt 中文意思是什麼
drift bolt
解釋
穿釘-
Practices on bolt, mesh, anchor and beam support in coal drift under unstable roof condition of cataclastic rock mass
不穩定頂板煤巷錨網索梁支護實踐 -
Research on digital analogy of rock - bolt support effect in weak rock drift
軟巖巷道錨桿支護效果的數值模擬研究
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