The three setsof mechanical seal components are as follows: actin ring, quiet ring, push the ring, spring, spring seat, auxiliary ring, ring, such as cards.
这三套机械密封都由如下部件组成：动环、静环、推环、弹簧、弹簧座、辅助密封圈、卡环等。
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We are pleased to tell you that we have shipped today by m. v. "Red Ring" 100 setsof sewing machines.