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Ball Valve - Products - Jingdong Heavy Valve Co.,Ltd.
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Ball Valve - Products - Jingdong Heavy Valve Co.,Ltd.
Website URL:
http://jdbv.com/category/ballvalve-1.html
Category:
Advertising Equipment
Ball valve develops from cock. its starting and closing parts are balls. It is opened and closed by rotating the ball 90°along the stem axis.
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