| 摘要 |
A coiling tape measure which is coiled and stored in a housing. In its uncoiled state the tape has a slightly curved cross-sectional section with a convex lower surface. On its convex lower surface there are one or more closed channels and a device is provided for supplying a pressure medium to said closed channels to effect an increase in the self-supporting capacity of the tape measure. Several embodiments of the channels on the convex surface and several embodiments of the pressure supply device are disclosed. |
