SECTIONAL PORTABLE FILM COVER Russian patent published in 1995 - IPC

FIELD: agriculture. SUBSTANCE: cover comprises a framework made up of transverse frames, and of ridge, spacer and longitudinal bars. The wooden members of the framework are interconnected by serrated washers and secured with bolts. To promote stiffness, the framework has string-type braces. Perpendicularity of spacer bars to frames is ensured by centering guide rods. EFFECT: higher reliability, repairability and convenience of operation. 9 cl, 41 dwg