The three sets of 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。
We are pleased to tell you that we have shipped today by m. v. "Red Ring" 100 sets of sewing machines.
很高兴通知贵方，近日已将100台缝纫机装至“红指环号”船上。
We are pleased to tell you that we have shipped today by m. v. "Red Ring" 100 sets of sewing machines.
很高兴通知贵方，近日已将100台缝纫机装至“红指环号”船上。
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