Air compressor turn on, turn off:
-
Working machine engine
-
Stitching machine
-
Grind metal on a grinding machine in a
-
Mill for grinding grain, Brewing unit
-
Automatic telephone switch
-
Low frequency running engine
-
Print imprinted in cardboard, Notches
-
Welding, Car factory, hammer knocking
-
Brewing unit, fluid drilling
-
Oil pump
-
Book press
-
Electric welding
★★★★★