| 摘要 |
<p>A switch operator characterized by a tubular base, a tubular member movably mounted within the base, biasing means for holding the member in an inoperative position, a tubular manual knob detachably mounted on the member, the knob having an outer closed end portion, a switch unit including a contact operator adjacent the end of the member opposite the knob, the contact operator being operable by the member upon movement of the knob, and sealing means at least between the tubular base and tubular member.</p> |
