... of 2.10m: “3-hi” tubes are coated with the patented interferential coating technology, achieving the absorptance of 96 ... constant temperature and in high pressure; the tank, when processed with high-temperature ripening, will get the evener foaming and ... . C. Supports: Made of galvanized sheet, the supports are processed with 14 steps, such as degreasing, phosphorescing, electrostatic spraying, high ...