V-ball valve repair without a long, long life, to provide you with the real state of efficiency of a process control valve.

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。

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V-ball valve is the first valve design of the regulator, after a very long time usage, the manufacture technology is already matured.

形球阀作为最早设计出的调节性阀门，经过了很长时间的使用，制造的技术已经成熟。

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V-ball valve is the first valve design of the regulator, after a very long time usage, the manufacture technology is already matured.

V形球阀作为最早设计出的调节性阀门，经过了很长时间的使用，制造的技术已经成熟。

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Hair made the offer in the wake of the ball-tampering row at last week's England v Pakistan Test at The Oval.

BBC: SPORT | Cricket | Hair 'could stay' as Test umpire

The first was Courtney Walsh for West Indies v Australia at Brisbane in 1988-89 (last ball of the first innings and the first two of the second).

BBC: Ask Malcolm Ashton