Dial Protractor
DP-501*ยกเลิการผลิต Discontinued Item.
Description
Measured angles
are indicated on the dial, so that reading is quite easy,
Us
ing the Dial Protractor, you can measure internal angles, external
ang
les, acute angles and obtuse angles. With the mavable part locked,
the
protractor is set for a desired angle.
Therefore
you can get plus and minus readings with the set angle as
poi
nt O.