| 摘要 |
The tape includes a housing 10 which is formed with a downward extending cylindrical hole 11 at one end which hole terminates at its lower end in a pen tip opening 12. An inner wall of the cylindrical hole 11 is provided with intersecting cross lines which extend outwardly to define a right angled recess 14 in the end wall of the housing 10. A tape 20 marked on opposite edges with scales 21 can be drawn out of the housing at the other end thereof and the tape is formed with a hole 22 which can serve as the centre of a circle which can be drawn by inserting a writing implement in the hole 11 and rotating the housing 10 about a fixing element engaged in the hole 22 in the tape 20. The scales 21 may be marked with any suitable units of measurement but metric and Imperial units are preferred. The top of the housing 10 is provided with a bubble level 15 to ensure that the housing is horizontal when in use. With the tape it is possible to draw a circle, to measure whether an article is vertical and to measure the horizontal distance between two points at different levels. |
