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【简单介绍】
【详细说明】
● Blow-out Proof Stem
● Investment Casting Body
● Pressure Blance Hole in Ball Slot
● Reduce Port
● Various Thread Standard Available
● Locking Device Available
● Design: ASME B16.34
● Wall Thickness:ASME B16.34,GB12224
● Pipe Thread: ANSI B 1.20.1
BS21/2779,DIN 259/2999,ISO 228
● Inspection & Testing:API 598
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