“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	differential interferometer differential keying differential leak detector differential leukocyte count differential leveling differentially coherent phase-shift keying differential manometer differential microphone differential-mode gain differential-mode input differential-mode signal differential modulation differential motion differential motor differential operational amplifier differential operator differential output voltage differential permeability differential phase differential phase-shift keying differential piece-rate system differential polarography differential pressure differential-pressure fuel valve differential-pressure gage

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