B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
B07B1/469—Perforated sheet-like material
B—PERFORMING OPERATIONS; TRANSPORTING
B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
Acier pour la fabrication de moules pour le moulage par injection de matieres plastiques ou pour la fabrication d'outils pour le travail des metaux
Procede d'une fabrication de piece ouvree en acier ayant une tres forte resistance a l'abrasion, par decoupage d'un produit plat et piece ouvree obtenue.