Company Profiles BASE, Inc. (HVAC Contractor) BASE = Boiler & Air Conditioning Service Engineers. We sell, install and service all HVAC (Heating, ventilating & air conditioning) equipment. We are an "R" Stamp Holder as required to repair... oPetrol It was at the beginning of year 2003 when I met Prof. Liang in an alumni gathering of our university and heard about oxy-gasoline torch for the first time. Three liters of gasoline will do the same... Welder's Corner Welding news, articles, analysis, and technical information. Welding consultation and assistance.