un. 反復(fù)彎曲試驗 backward and forward bending test: 反復(fù)彎曲試驗forward and backward bending tester: 往復(fù)彎曲試驗機forward and backward: 前后forward bending: 前彎backward bending supply curve: 向后彎曲供給曲線下載手機詞典可隨時隨地查詞查翻譯