超靜定構件取代法 method of exchange of members: 構桿交換法; 構件交換法method of retained members: 保持人數(shù)法retained members method: 選擇保留法method of redundant reactio: 彎矩面積法method of redundant reaction: 超靜定反力法下載手機詞典可隨時隨地查詞查翻譯