self-adjusting seal unit是什么意思

用法例句

2 in Guangshen Shajiao B Power Co Ltd had been retrofitted into selfregulated glandpacking (Breden glandpacking), and the last stage blades changed into 660.

广深沙角B电力有限公司2号汽轮机在大修中将高中压轴封及隔板汽封改为自调整汽封(布莱登汽封),低压末级叶片改为日本东芝公司最新研制的第三代26″(660。