... :2008 3.GB/T 19001-2008 4.AAA Grade Credit Unit Description LWC Coil(Standard according to ASTMB360) O.D.(Inch ... Exchange. Bellow in detail:1. Air Conditioner and Refrigerator2. Water Tube Service and Distribution3. Fire Protection, Solar, Fuel/Fuel Oil4. Natural ... congeneric products, such as Pancake Coil, Straight Copper Pipe, Aluminum Tube Coil LWC Coil Copper ...