| 摘要 |
<p>The appts. consists of four microswitches, two each side of the axis BB, one on top of the other. The microswitches are fixed to the casing(1) by screws(13, 14, 15, 16). A lever(17) is fixed to an axle(11), which is also attached to two internal levers which can each contact two switch buttons. By moving the lever(17) to one of four positions(18, 19, 20, 21), one of the microswitches is activated and the others become or remain unactivated.</p> |
