分流 套管（tapping sleeve）常常用来连接从3/4" 到11/2 " 粗的供应管到某一6"或者更大的 给水干管（water main）以提供住宅供应。 对于更大的供应，可能用分流套管来连接消 防栓和消防机（fire service），当然有时也 用三通管（tee）。
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feeding water main 供水喉管
water main diversion works 总水管改道工程
water main laying 总水管敷设工程
storm-water main 雨水总管
fresh water main 总食水管
storm-water main drain 雨水排放主渠
water main raising 给水竖管
water main valve 给水干管阀
circulating water main 循环水总管
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N-COUNT A water main is a very large underground pipe used for supplying water to houses and factories. 总水管
No one can predict what bridge, levee or water main will fail next.
没人知道下一次出问题是桥梁，河堤还是水管。
On this particular job, I was digging a 2 water main with four other guys.
我在做的这一特殊的苦力活就是和其他四个伙计一块挖一条主输水管。
The kit includes an industrial-sized bucket and is designed to be connected to your water main for automatic filling.
该工具包包含一个标准尺寸的水桶，可以直接连接水管，自动灌满。
His main targets were companies that supplied the public with water, electricity,and natural gas.
VOA: special.2010.08.05
"The main concern,number one, everybody had more than anything, buy number,was food and water;
VOA: standard.2010.01.30
In developing countries, the main source of water pollution is not stormwater,but waste water.
VOA: standard.2010.08.04
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