“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	water loss and soil erosion of highway water loss rate of steam heat-supply system Water lotus water-loving water management water management in ancient China water management in field water management institutions in Britain water management institutions in Cambodia water management institutions in Laos water management institutions in Mongolia water management institutions in Russian water management institutions in Viet Nam Waterman crater Water Margin Drama Collection watermarkes water market water maser water mass water-measuring device water-measuring weir water mechanical characteristics watermelon watermelon anthracnose watermelon bacterial angular spot

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