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单选题
3210. 用来处理水和废物的系统部分。包括洗手池、水柜、冲水系统等。
A
A component of a system used to treat waste water. Including washbasin, water cabinet, toilet system, etc.
B
That portion of the system which is used for disposal oil water and waste. Includes items such as wash basins, water closets, flushing systems, etc.
C
The part of a system used to treat waste water. Including washbasin, water pipe, flushing system and so on.
答案解析
正确答案：B
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