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yiqiesuifengerqu

正向安装时阀开启省力,关闭费力;反向安装时,阀关闭严密,开启费力;阀只需转90°即可快速启闭,操作简单
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提交时间:2012/9/3 22:32:00

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QBR

The forward mounted valves are easy to open,but difficult to close; and the backward mounted valves are tightly closed and difficult to open; the valves only need 90° degree turning for quick opening and closing operation.

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改译

2012/9/4 8:39:00

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