型球阀长期不需修理，使用寿命长，为您提供了真正的高效率进行控制工艺状况的一种阀门。
V-ball valve repair without a long, long life, to provide you with the real state of efficiency of a process control valve.
禁止对阀门作任何修改。任何修理只能由供应商或在其指导下进行。
No modifications to valves are permitted and any repairs shall only be made by or under direction of the supplier.
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