“trapdoor”的概念、定义、翻译、参考文献-科学参考

单词	trapdoor
释义	trapdoor [`trap¦dȯr] ^{BUILDING CONSTRUCTION} A hinged, sliding, or lifting door to cover an opening in a roof, ceiling, or floor.
随便看	filiform filiform corrosion filiform lapilli filiform papilla fill fill characters filled band filled composite filled insulation filled stopes filled-system thermometer filled thermometer filled thermoplastic filled thermoset filler filler metal filler specks fillet fillet gage fillet lightning fillet weld fill factor filling filling in fill justification

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