“primary drilling”的概念、定义、翻译、参考文献-科学参考

单词	primary drilling
释义	primary drilling [`prī´mer·ē `dril·iŋ] ^ENGINEERING The process of drilling holes in a solid rock ledge in preparation for a blast by means of which the rock is thrown down.
随便看	astronomical twilight astronomical unit astronomical year astronomic tide astronomy Astropectinidae astrophobia astrophyllite astrophysics astropyle astrosphere astrotracker Asturian orogeny asty astylar asulcal A supply as-welded asymbolia asymmetrical bedding asymmetrical cell asymmetrical conductivity asymmetrical deflection asymmetrical fold asymmetrical laccolith

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