ES190014A3 - Una máquina para ampliar fotografías. con dispositivo automático para graduar la longitud focal en función del porcentaje de ampliación
- Google Patents
Una máquina para ampliar fotografías. con dispositivo automático para graduar la longitud focal en función del porcentaje de ampliación
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ES190014A1949-09-301949-09-30Una máquina para ampliar fotografías. con dispositivo automático para graduar la longitud focal en función del porcentaje de ampliación
ExpiredES190014A3
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