“trap seal”的概念、定义、翻译、参考文献-科学参考

单词	trap seal
释义	trap seal [`trap ´sēl] ^{CIVIL ENGINEERING} The vertical distance between the crown weir and the top of the dip of the trap in a plumbing system.
随便看	pyxidium Pyxis pyxis pz PZT pébrine Q Q band visible spectrum vision vision light vision slit visor tin visual achromatism visual acuity visual aid to navigation visual angle visual-aural range visual binaries visual bombing visual bombsight visual colorimetry visual comparator visual display unit visual doubles

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