单词：sewer line
sewer line的用法和样例：
例句
- He was informed that the sewer pipe in the area has a serious breakage and the system is malfunctioning.他被告知，该地区的污水管道已经严重遭受破损，该排污已系统出现故障。
- It became necessary to provide drainage or sewer systems to carry such wastes away from the area.提供排水系统或污水管道系统，把废物排出市区已成为必要。
- sewer main污水干管
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