“positive derail”的概念、定义、翻译、参考文献-科学参考

单词	positive derail
释义	positive derail [`päz·ǝd·iv di`rāl] ^{MINING ENGINEERING} A device installed in or on a mine track to derail runaway cars or trips.
随便看	Darrier's disease d'Arsonval current d'Arsonval galvanometer dart dart configuration dart leader dart sac darwin Darwin curve Darwin-Doodson system Darwin ellipsoids Darwin glass Darwinism Darwin's finch Darwin's theory Darwinulacea Darzen's procedure Darzen's reaction Dasayatidae Dascillidae Dascilloidea DASD dasheen dashkesanite dashpot

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