短语词组短語washing sand out 沖砂washing -out 排汙;汙水;洗去residual washing -out 殘渣洗滌slag -washing-out pump 沖渣水泵washing out and separation 洗脫分離hang the washing out 把洗過的衣物晾曬在外麪pile washing out 沖樁washing out method 清洗法;洗出法 返回 washing out