Functions : two stage shut-off, flow-rate control in conjunction with any electronic register with digital flow control.
功能： 双开关，流量控制与任何数字流量控制的电子登记 结合。
Functions : two stage shut-off, flow-rate control in conjunction with any electronic register with digital flow control.
功能： 双开关，流量控制与任何数字流量控制的电子登记 结合。
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