FIELD: machining attachments. SUBSTANCE: drainage is manufactured in the form of single-piece device fitted with upper and lower drainage layers interconnected over perimeter. Vacuum tube and layers of porous material are placed between drainage layers. Material of lower layer exhibits adhesive properties. EFFECT: increased moulding capabilities. 2 cl, 3 dwg
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Authors
Dates
1994-10-15—Published
1990-12-29—Filed