Bevel protractors (mechanical and optical). Requirements and test methods Ingestion-build-117251 corridors and escape routes

corridors and escape routes

1 Test specimen mounting

Performance

including measurement of pressure

Bevel protractors (mechanical and optical). Requirements and test methods Ingestion-build-117251 corridors and escape routesBS 1685: 2008 Bevel protractors (mechanical and optical). Requirements and test methods BS 1685: 2008 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, but without slow motion device or acute angle attachment Type C. With scale graduated in degrees,