A.直軸 B.曲軸 C.撓性軸
A.脈動(dòng)循環(huán)變應(yīng)力; B.靜應(yīng)力; C.非對(duì)稱循環(huán)變應(yīng)力; D.對(duì)稱循環(huán)變應(yīng)力