非完全密封金属板
incompletely sealed metal plane
金属密封碟阀
hard seal butterfly valves
金属密封面
the metallic sealing section
金属密封纸介电容器
metal sealed paper-insulative capacitor
空心金属密封环
hollow metal sealing ring
密封金属化聚苯乙烯电容器
enclosed metalized polystyrene capacitor
无摩擦金属密封阻尼器
frictionless hermetic damper
焊接金属波纹管机械密封
welded metal bellow type mechanical seal