prim - push
- primary battery
- primary brake shoe
- primary catalytic converter
- primary cell
- primary chain
- primary circuit
- primary coil
- primary compression
- primary compression ratio
- primary control
- primary drive
- primary forward brake shoe
- primary key
- primary magnetic field
- primary pattern
- primary piston
- primary pressure
- primary pull-off diaphragm
- primary pump
- primary seal
