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US5688327A Chuck assembly having a controlled vent 失效
具有受控通风口的卡盘组件

Chuck assembly having a controlled vent
摘要:
A chuck assembly for engaging the inner surface of a hollow substrate including: (a) a body defining a hole, wherein the hole is positioned to be in communication with the air inside the substrate; and (b) a gas pressure regulating apparatus coupled to the hole for regulating the gas pressure inside the substrate.
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