72307724
Sep 19, 1968
Sep 22, 1970
MACHINES AND APPARATUSES FOR WORKING PLASTICS-NAMELY, MOLDS, PLASTIFYING MACHINES, MACHINES FOR MAKING HOLLOW PIECES, PISTON-TYPE AND SCREW-TYPE INJECTION MOLDING MACHINES, SCREW-TYPE EXTRUDERS; AND POWER TRANSMISSIONS FOR USE IN SUCH MACHINES AND APPARATUSES
Yarns and Threads