“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	red giant up red-glazed of Long ware red glazed porcelains of Lang Kiln Red Guard Red Guards on Honghu Lake red horizontal-branch redifferentiation Rediffusion Television Limited red imported fire ant redirect redirected behavior of livestock redirection redirect-on-write redirect-on-write, ROW red iron oxide rediscount policy rediscount rate rediscount system redissolve redistillation redistilled water re-distribution redistribution redivision and reunion of yin and yang red king crab

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