摇把

我的车子太旧，冷天的早晨得用摇把发动。

My car 's so old that I have to crank it on cold mornings .

转动摇把，通过伞轮使螺杆转动。

The crank handle is rotated to lead a screw to rotate through an umbrella wheel .

哈代说：“只有完全不懂数学的人，才会相信有一台超自然的机器，数学家们只要转动他的摇把，就能得到新的发现。”

As Hardy said , ' It is only the very unsophisticated outsider who imagines that mathematicians make discoveries by turning the handle of some miraculous machine . '

推料螺杆的一端架在支架上，推料螺杆的另一端突出于炉体一侧，并与摇把相连接。

One end of the push crew is put on a bracket , and the other end is extended out of one side of the stove body and connected with a crank .

使用摇把转动定滑轮圈绕钢丝索，即可提升备胎，反转摇把即可平稳降下备胎。

The fixed pulley is rotated by a cranking bar to wind the steel cable , a spare tire can be lifted , and the spare tire can be put down stably by rotating in reversal the cranking bar .