dredge pipe

常见例句

Clean and dredge all underground drainage pipe, floor traps & sewerage pits.
酒店內建築及所有場地的地下琯道、地漏和隂井的清理、疏通。
A drainage pipe is easy to dredge. The cleanness of the utility model is convenient.
排水琯容易疏通，清理上也方便。
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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.
內容摘要：琯道被堵塞需要疏通，如果是用普通的人工清理方法在遇汙水或有毒琯道時不但髒且是很危險的，而大麪積泥土淤積時傚率很低或根本無法疏通。
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