短語(yǔ)詞組短語(yǔ)swing boat davit 鏇轉(zhuǎn)式艇架outreach of boat davit [船]吊艇架跨距luffing type boat davit 搖倒式艇架gravity -type boat davit 重力式吊艇架loading capacity of boat davit [船]吊艇架額定負(fù)荷 返回 boat davit