stem seal

常见例句

双语例句

• Describing several structures of stem seal and existent problems.
  阐述了阀杆密封的几种结构及存在的问题。
• The backup seal is secondary to the main stem seal assembly (20) in the bonnet (12).
  备用密封件是阀帽（12）内主阀杆密封组件（20） 的二级密封。
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• The stem seal of a feed water control valve uses expanded graphite packing in order to produce friction and to economize on energy for the control valve working.
  电站锅炉给水调节阀的阀杆密封采用柔性石墨填料，既降低了摩擦力，又为调节阀的运行节约了能源。
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