Introduce

1 (i.e. the distance between point 1 and point 4)

The rear of the wheel body of the ranging wheel is pressed against the starting wall, and the distance measuring wheel is pushed in a straight line, so that the front wheel reaches and adheres to the target wall, and the value at this time is read, plus the diameter value of the wheel body is the distance between the two walls.

 

Second. The measurement method of using the distance measuring wheel from the wall to the point spacing

1 (i.e. the distance between point 1 and point 3)

The rear of the wheel body of the ranging wheel is close to the starting wall, the straight line pushes the ranging wheel, after reaching the destination point, the vertical needle is pointed vertically to the destination point, and the value at this time can be read and the value of the radius of the wheel body can be added.

 

3. A method of measuring the distance between points and points using the ranging wheel

1 (i.e. the distance between point 2 and point 3)

The vertical needle of the ranging wheel is pointed vertically Pi tape measure to the starting point, and the distance measuring wheel is pushed in a straight line, and after reaching the destination point, the vertical needle is pointed vertically to the destination point, and the value displayed at this time can be read.