| 摘要 |
<p>The rotary linear measure, of some 10 metres' length, according to the invention comprises a frame (17), a drum mounted inside the frame (17) and capable of rotary movement, a tape (20) wound onto the drum, and a crank arm (6) used to drive the drum to wind up the tape (20). It is characterised in that the crank arm (6) drives the drum via a step-up gear (4) mounted removably on the outside of the frame (17). <IMAGE></p> |
