短语词组短語bailer r method 撈砂法bailer r method of cementing 用撈砂筒注水泥bailer method of cementing 用撈砂筒注水泥the dump bailer method 傾筒法打水泥塞dump bailer method 傾筒法;傾筒法打水泥塞 返回 bailer method