Needle valve is a kind of globe valve , it has the characteristics of globe valve , and also have its own characteristics , for example, the needle valve can adjust the flow rate of the medium precisely , and the top of the stem is a needle , so it is called needle valve .
Needle valve is a kind of globe valve , it has the characteristics of globe valve , and also have its own characteristics , for example, the needle valve can adjust the flow rate of the medium precisely , and the top of the stem is a needle , so it is called needle valve .
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