71456815
Nov 13, 1942
May 18, 1943
MECHANICALLY DRIVEN MIXING DEVICES FOR CEMENTITIOUS MATERIALS, RECEPTACLES CONNECTED THERETO FOR RECEIVING SAID MIXED CEMENTITIOUS MATERIALS THEREFROM, AND MEANS FOR DISCHARGING SAID MATERIALS FROM SAID RECEPTACLES UNDER PRESSURE, TOGETHER WITH PARTS THEREOF
Yarns and Threads