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ES71251A1919-10-281919-10-28El compuesto químico de un abono que se denominará "Abono nitrogenado Contell" aplicable a toda clase de plantas.
ExpiredES71251A2
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Un aparato, con sus correspondientes accesorios, para toda clase de desinfecciones y saneamiento por medio de gas cianhídrico, aplicable indistintamente en la agricultura para la extinción de plagas de campo y saneamiento de árboles, plantas y suelos. Com