电子器件封装领域，不知道怎么翻合适，请教高手老手帮帮忙。为了理解，多发几句以助理解。谢谢啦。
Fig.5 shows an embodiment of the invention illustrating how the fill head always \"step down\" to the next platform to reduce stress on the O-ring . In this embodiment the parking plate 440 can be actively lifted through mechanical means or it can be lifted by interaction with guides. The plate 440 can have an actuator beneath it that lifts it (hydraulic,pneumatic,mechanical) or, in the case of a fixed head ,it can have rollers or guide pins on the ends or underneath the plate that engage ramped guide structures which cause the plate\'s level to change as the plate moves across the guide structures. |
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