Easy Regrinding Tap Bosses on top of the disc permit inserting nipples or eye bolts to facilitate quick removal of the disc for grinding.

• 易于再研磨的攻丝轮毂位于阀瓣顶部，允许插入管嘴或有眼螺栓，促进阀瓣迅速拆卸下来进行研磨。