D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
D01H—SPINNING OR TWISTING
D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
D01H1/14—Details
D01H1/16—Framework; Casings; Coverings ; Removal of heat; Means for generating overpressure of air against infiltration of dust; Ducts for electric cables
D01H1/162—Framework; Casings; Coverings ; Removal of heat; Means for generating overpressure of air against infiltration of dust; Ducts for electric cables for ring type