Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors /

Έκδοση 1950

Electric contacts handbook = Elektrische Kontakte /

ανά Holm, Ragnar
Έκδοση 1958

Specification for protected-type non-reversible plugs, socket-outlets cable-couplers and appliance -couplers with earthing contacts : for single phase a.c. circuits up to 250 volts...

Έκδοση 1961

Automatic change-over contactors for emergency lighting systems /

Έκδοση 1954

Der Kontaktumformer /

ανά Rolf, Erich
Έκδοση 1957