| 摘要 |
A switch is provided including an actuating member having a piston portion at one end responsive to applied fluid pressure, a guide portion at its opposite end encompassed by a coiled compression spring, and having an intermediate annular rib engageable with inwardly projecting tabs of actuately extending contact plates. Each of two of the contact plates has a contact selectively engageable with a corresponding contact on the third contact plate in response to movement of said actuating member.
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