標準號：BS 1685-2008
中文標準名稱：斜角規(guī)量角器(機械和光學).試驗方法和要求
英文標準名稱：Bevel protractors (mechanical and optical) - Requirements and test methods
標準類型：J42
發(fā)布日期：2008/11/30 12:00:00
實施日期：2008/11/30 12:00:00
中國標準分類號：J42
國際標準分類號：17.040.30;53.020.30
引用標準：BS 869;BS EN 12540;BS EN ISO 18265
適用范圍：This standard relates to the following types of bevel protractors:a) Mechanical.Type A. With vernier graduated to read to five minutes of arc,and with slow motion device, and acute angle attachment.Type B. With vernier graduated to read to five minutes of arc, butwithout slow motion device or acute angle attachment.Type C. With scale graduated in degrees, without vernier or slowmotion device or acute angle attachment.b) Optical. With an internal circular scale which is graduated indivisions of 10 minutes of arc1) and read against a fixed index lineor vernier by means of an optical magnifying system integral withthe instrument, enabling readings to be taken, by estimation orotherwise, to approximately two minutes of arc.