タイトルまたは説明

Vacuum tubes assimilate the advanced *2 layers of spattering deposition of trivalent elements, high borosilicate glass, gradual change of SS-AL/CU selective complex absorptive coating and these make vacuum tubes have high performance of absorptance and low reflection ratio. Through the interlayer, vacuum has a unique effect of thermo, with its temperature up to **0 degrees of idle sunning, performing a strong heating function. Features: 1) Structure: all glass coaxial dual tube 2) Material: high borosilicate glass 3.3 3) Interferential coating: copper, aluminum nitride 4) Capabilities: a) Fast thermal collecting efficiency b) High heat resistance c) High cold resistance 5) Life time: *5 years.