만능분도기(萬能分度器; universal bevel protractor)
Universal Bevel Protractor reads to 5 minutes of angle using the wide magnifier and a vernier scale. Degrees can be read directly off of the main scale, while the minutes are read on the vernier scale. magnifying glass for easy reading
dial식 만능분도기
둔각을 측정하는 예
예각을 측정하는 예
magnifying glass for easy reading
