When closing, the sphere surface is getting gradually to the seat so that efficiently remove the obstacle of scaring and scaling, and reach reliable sealing by the self-lock effect of angle eccentric.
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美
释义
关闭时蝶板球面逐渐接近阀座;可有效地切除结疤;结垢等现象;依靠角偏心的自锁作用;开关省力实现可靠密封.
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