73357191
Mar 29, 1982
RECIPROCATING INTERNAL COMBUSTION ENGINES FOR CONTINUOUS DUTY APPLICATIONS, NAMELY, SLOW-SPEED, SMALL HORSEPOWER, SPARK-IGNITION ENGINES ADAPTED TO OPERATE ONNATURAL GAS FUEL, FOR OILFIELD PUMPING OPERATIONS, AND FOR RECIPROCATING GAS COMPRESSORS FOR OILFIELD APPLICATIONS
Machinery