单弹簧机械密封 Single spring seals

多弹簧式机械密封 [机] multiple-spring mechanical seal

单弹簧式机械密封 [机] single-spring mechanical seal

弹簧静止式机械密封 spring standing mechanical seal

多弹簧式机械密封- multiple-spring mechanical seal

单弹簧式机械密封- single-spring mechanical seal

弹簧旋转式机械密封- spring rotating mechanical seal

弹簧静止式机械密封- spring standing mechanical seal

弹簧内置式机械密封- mechanical seal with inside mounted spring