fiber glass batt insulation
3.INHALATION: Fibrous glass dust may be released from the fiber-glass cloth substrate when machined.
6.insulation test
7.sound insulation
10.We also described the amplification mechanism of erbium doped fiber amplifier and thulium doped fiber amplifier, obtained the conclusion that rare earth doped tellurite glass amplification fiber is close to practical application in view of the current R&D of erbium doped tellurite glass amplification fiber and thulium doped tellurite glass amplification fiber.
