压盖是紫砂壶盖式之一。
填料压盖用来压紧填料环。
The packing gland is used to maintain compression on the packing rings.
吴曼用右手上的假指甲拨弦，而用左手手指压盖音柱。
The fake fingernails on Ms Wu's right hand pluck the strings, while her left hand fingers the frets.
使用机械密封时，应调整机封压盖螺柱，使其无泄漏。
If mechanical seal is used, adjust the stud on the gland to ensure no leak with it.
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