IPC Subgroup
G01L 21/2 using members oscillating about a vertical axis
Introduced: September 1968
Last revised: January 2006
Full Title
Vacuum gauges > by measuring variation of frictional resistance of gases > using members oscillating about a vertical axis
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE