pipe dredge

基本解釋

Clean and dredge all underground drainage pipe, floor traps & sewerage pits.
酒店內(nèi)建筑及所有場(chǎng)地的地下管道、地漏和陰井的清理、疏通。
A drainage pipe is easy to dredge. The cleanness of the utility model is convenient.
排水管容易疏通，清理上也方便。
ip.com
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