grab bucket dredger抓斗式挖泥船
grab bucket scales抓斗秤
grab bucket gantry crane龙门起重机
timber grab bucket原木抓斗
Grab bucket driving抓斗驱动
grab bucket gantry抓斗龙门吊
grab bucket conveyer抓斗式运送机
Hayward grab bucket海沃德抓斗
grab bucket type crane抓斗门式起重机