... 试验爆破：experimental firing 试探钻孔：trial bore hole 试探器：sounding borer ...
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... trial and error method 尝试法，试误法 trial bore hole 钻探洞 trial boring tool 钻探工具 ...
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试钻孔 test bore; test boring; trial bore hole 斜钻孔 deviating hole; oblique hole; obliquehole; splay ..
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