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Una prensa churrera giratoria, caracterizada por que tiene todos sus elementos básicos agrupados en un núcleo central de forma cilíndrica dispuestos verticalmente, a los que se enlaza o une rígidamente un brazo tubular cilíndrico que partiendo de ellos horizontalmente describe una amplia curva para descender formando una columna de sustentación ligeramente cónica terminada en una peana que se une por atornillamiento a la mesa o superficie de trabajo.
Procedimento per la preparazione in forma analiticamente pura di 3-idrossi-4,5-diidrossimetilpiridine sostituite in posizione 2 da un radicale idrocarburo