“prop-free”的概念、定义、翻译、参考文献-科学参考

单词	prop-free
释义	prop-free [`präp ´frē] ^{MINING ENGINEERING} A face with no posts between the coal and the conveyor used to remove it in longwall mining of a coal seam.
随便看	sharp V thread shatter breccia shatter cone shattercrack shattering shatterproof glass shatter zone shattuckite Shaula shave hook shaving Shaw process sheaf sheaf of planes sheaf structure shear shear angle shear burst shear cell shear center shear cleavage shear diagram shear drag shear fold shear fracture

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