| 摘要 |
A control device for use on a working surface includes a bottom housing configured to be placed on the working surface; a top housing coupled with the bottom housing, the top housing including at least one key; an actuator disposed between the bottom housing and the top housing and coupled with the key; a switch disposed between the bottom housing and the top housing, wherein the switch is activated via application of an actuation force to the key; and an adjustment means configured to enable a user to adjust the actuation force required to activate the key.
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