| 摘要 |
PURPOSE:To prevent leakage when opening/closing by sealing the opening for inserting a plate with resilient metal in double step. CONSTITUTION:Resilient seals 3 are mounted in double step at the opening of a duct 1 for inserting a plate 2. Consequently, leakage of inner fluid through the duct opening is reduced considerably when removing or inserting the plate 2. |
