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ES10912A1890-06-111890-06-11Un nuevo aparato refractor que sirve para aumentar la fuerza luminosa en la luz de gas sin aumento de fluido.
ExpiredES10912A1
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Un procedimiento para extraer de sus recipientes los líquidos que contienen ácido carbónico u otro fluido gaseoso, o bien, los líquidos volatilizables o inflamables valiéndose para ellos de una aparato especial.