单选题往复泵阀箱被吸入阀和排出阀分隔为三层，泵缸通（）。A上层B中层C下层DA或B或C
单选题
往复泵阀箱被吸入阀和排出阀分隔为三层，泵缸通（）。
A
上层
B
中层
C
下层
D
A或B或C
参考解析
解析：
暂无解析
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