“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	nonsingular matrix nonsingular model nonsingular operator nonsingular perspectivity nonsingular point nonsingular projective transformation non singular quadratic form non-singular quadratic form nonsingular quadratic form non singular real algebraic variety non-singular real algebraic variety nonsingular real algebraic variety nonsingular solution nonsingular space nonsingular spacetime nonsingular stochastic process nonsingular surface nonsingular system non singular transformation non-singular transformation nonsingular transformation nonsingular value nonsingular variety nonsingular zero non-sintered brick

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