17 plastic material in the state of semi-finished products, in the form of sheets, plates, rods, blocks, sectional rods, hollow sectional rods and tubes; cast and injection-molded parts made of plastic material in the semi-finished state; combined sectional rods made of plastic material for the manufacture of windows, doors, frames, rolling shutters and building construction parts; sectional rods made of plastic material for the manufacture of windows, doors, frames, rolling shutters and building construction parts; plastic materials as finished products for building construction purposes in the form of sheets, plates, rods, blocks, sectional rods, hollow sectional rods and tubes