The butterfly plate is driven by the valve stem. If it rotates to 90 degrees, it can be opened and closed once. The flow rate of the medium can ……
The butterfly plate is driven by the valve stem. If it rotates to 90 degrees, it can be opened and closed once. The flow rate of the medium can ……
The butterfly plate is driven by the valve stem. If it rotates to 90 degrees, it can be opened and closed once. The flow rate of the medium can ……
The butterfly plate is driven by the valve stem. If it rotates to 90 degrees, it can be opened and closed once. The flow rate of the medium can ……
The butterfly plate is driven by the valve stem. If it rotates to 90 degrees, it can be opened and closed once. The flow rate of the medium can ……
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