| 摘要 |
A vertical transmission shift lever of a heavy duty high speed motor truck is provided with a transversely extending rotary handgrip which can be moved orbitally to shift the lever as required, and which can be moved rotationally to push or pull the speed-ratio switch as required. When moved orbitally, the transmission gears are shifted. When moved rotationally, the rear-axle gear-ratio is changed from high to low or vice versa. These movements can be made either contemporaneously or independently.
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