Plates, sheets, film, foil and strip, of noncellular poly"ethylene terephthalate", not reinforced, laminated, supported or similarly combined with other materials, without support, unworked or not further worked than surfaceworked or merely cut into squares or rectangles, of a thickness of > 0,35 mm (excl. such selfadhesive products, and floor, wall and ceiling coverings of heading 3918)