“back check”的概念、定义、翻译、参考文献-科学参考

单词	back check
释义	back check [`bak ´chek] ^{DESIGN ENGINEERING} In a hydraulic door closer, a mechanism that slows the speed with which a door may be opened.
随便看	SEC sec seca secalose secant secant conic chart secant conic projection sec-butylamine Secchi disk Secernentea sech zooxanthellae Zoraptera Zorn's lemma Zoroasteridae Zorotypidae zorsite zoster Zosteraceae Zosterophyllatae Zosterophyllopsida Z parameter Zr Z score Zsigmondy gold number

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