Not much to say about AWWA except a lot of the members are on both ASTM D19 and AWWA.We monitor duplication closely since they have tried to take D19 standards before.

• D19委员会的会员也同时参加税务协会，大多数标准制定活动在两个机构之间相互支持和协调，，不存在重复制定的现象。