“pilot hole”的概念、定义、翻译、参考文献-科学参考

单词	pilot hole
释义	pilot hole Encyclopedia 理学地质钻孔释 pilot hole先导孔在钻深孔或超深孔之前，在深孔或超深孔孔位附近钻的一口直径相对较小、深度相对较浅的钻孔。“双孔方案”中首先施工的钻孔。
随便看	polycomponent polycomponent coordination compound polycondensate polycondensation polycondensation monomer polycondensation process polycondensation reactor of polyester polyconic projection polyconic projection with meridional intervals on same parallel decrease away from central meridian by equal difference polyconic projection with meridional intervals on same parallel decrease away from central meridian by tangent difference polycrase polycritical point polycrystal polycrystalline polycrystalline diamond compact bit polycrystalline diamond cutting tool polycrystalline ingot polycrystalline material polycrystalline polymer polycrystalline silicon polycrystalline silicon solar cell polycrystal semiconductor polycrystal silicon polycrystal X-ray diffractometry polycube

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