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ES80682A1922-01-251922-01-25Un aparato para cargar de gas acetileno los recipientes que sirven para contener acetileno disuelto en acetona.
ExpiredES80682A1
(es)
Un método para extinguir los fuegos que se produzcan en o en derredor de los tanques de hidrocarburos, con el aparato correspondiente para llevarlo a la práctica.
Un aparato mejorado, con su procedimiento correspondiente, para afilar los dientes de los cubos y otras herramientas por el estilo utilizadas para fabricar piñones y ruedas dentadas.