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Open the upstream slowly and fill the valve.
慢慢开启上游并向阀门注水。
youdao
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To fill the system, open the shutoff valve upstream of the regulator.
如果要给系统进水，请打开调节阀上游的关断阀。
youdao
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To fill the system, open the shutoff valve upstream of the regulator.
如果要给系统进水，请打开调节阀上游的关断阀。
youdao