In the years after World War I, George Gille, John Kathe and George Wall of Quincy, Ill., designed a new vacuum pump. In 1920, discovering that the company where they worked had no interest in making ...
The lubricant in refrigeration and air conditioning systems has many important functions. Even though the circulated refrigerant is the working fluid required for cooling, the lubricant or oil is ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback