dredge pipe line
常見(jiàn)例句
- Brief: The pipe line is needed to dredge when it was blocked. It is very dirty and dangerous and lower efficiency or can not operate by manpower when the pipe line is waste or poisonous.
內(nèi)容摘要：管道被堵塞需要疏通，如果是用普通的人工清理方法在遇污水或有毒管道時(shí)不但臟且是很危險(xiǎn)的，而大面積泥土淤積時(shí)效率很低或根本無(wú)法疏通。
blog.sina.com.cn 返回 dredge pipe line