MACHINE PARTS, NAMELY GUIDE RINGS, BEARING BUSHINGS, SCRAPERS IN THE FORM OF WIPER STRIPS AND WIPER RINGS, AND SLIDE WAYS [ ; PISTONS FOR LIQUID AND GASEOUS PUMPS ]

PACKING MATERIAL FOR ROTATING AND RECIPROCATING MACHINERY; SEALING MATERIAL FOR FABRICATING GUIDE RINGS, BUSHINGS, SCRAPERS, WIPERS