20 FLOOR COVERING, SUCH AS CARPETS, STAIR CARPETS, RUGS; FLOOR, BATHTUB, SHOWER STALL, DRAINBOARD, DOOR, AND OTHER MATS; ALL THE FLOOR COVERINGS AND MATS BEING MADE OF LINOLEUM OR PLASTICSURFACED OR PLASTIC-IMPREGNATED BACKING; TABLE AND SHELF COVERING OF OIL CLOTH