“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	envenomation environment environmental biology environmental cab environmental control environmental control system environmental engineering environmental impact analysis environmental impact statement environmental lapse rate environmental pathology environmental protection environmental radioactivity environmental range environmental resistance environmental stress cracking environmental test environmental variance environment division environment of sedimentation environment pointer environment simulator enzootic enzyme enzyme induction

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