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Portaplumas de sobremesa, caracterizado por el hecho de estar constituido por una esfera provista de un contrapeso interior que contrarresta el momento de giro procedente del encaje de uno o varios elementos de escritura en otros tantos orificios practicados en la esfera, de tal manera que los mangos saledizos queden siempre a unos de inclinación con respecto al plano horizontal de apoyo y, además, en equilibrio estable.
ES1975209784U1975-02-081975-02-08Portaplumas de sobremesa.
ExpiredES209784Y
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