A.10mB.12mC.14mD.16m
A.斜腹桿B.平臺(tái)梁C.杠桿D.斜桿
A.調(diào)伸長(zhǎng)度B.鋼筋長(zhǎng)度C.拉伸長(zhǎng)度D.錨固長(zhǎng)度