“flap trap”的概念、定义、翻译、参考文献-科学参考

单词	flap trap
释义	flap trap [`flap ´trap] ^ENGINEERING In plumbing, a trap fitted with a hinged flap that permits flow in one direction only, thus preventing backflow.
随便看	underthrust undertow undervoltage protection undervoltage relay underwater acoustics underwater burst step attenuator step bearing step block step brazing step-by-step operation step-by-step switch step-by-step system step change step-climb profile step counter step cut step-down transformer step fault step function step-function generator step gage Stephanian Stephanidae stephanite

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