72335284
Aug 14, 1969
Mar 6, 1973
CLEANING MACHINES UTILIZING STEAM, WATER, AND ALKALI SOLUTIONS FOR CLEANING RAILWAY EQUIPMENT; AN ENGINE PROTECTOR UNIT EMPLOYED TO SHUT DOWN DIESEL ENGINES WHEN CRANK CASE PRESSURE OR TEMPERATURE REACHES A PREDETERMINED LEVEL; CRANES; AND GRADER ATTACHMENTS FOR ELEVATING MATERIALS FROM IN FRONT OF A GRADER BLADE
Yarns and Threads