A manually controlled lever projecting from the switch permits the driver to signal the direction in which he wants to turn.
从开关上突出的一个用手控制的杠杆使驾驶员能根据所转的方向显示转向信号。
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This feature provides the driver the opportunity to signal a lane change by holding the turn lever against a dent, then releasing it so cancel the signal immediately after the maneuver is completed.
The Model 21 Adjustable Ratio pneumatic relay has a signal chamber lever arm, whereby the ratio of output pressure to signal pressure is infinitely adjustable.