The covering material that encases the core of an optical fiber. the cladding material usually has a lower index of refraction than the core material and may be either glass or plastic.
一种包装光纤芯的保护材料。保护材料的折射率通常比光纤芯的折射率低，它一般是玻璃或塑料。
2
The glassfiber strengthen unsaturated polyester mould pressing shape outer covering. Have the strength high, bear the impact and bear the good function in etc. in corrosion.
玻璃纤维增强不饱和聚脂模压成型外壳，具有强度高，耐冲击、耐腐蚀等优良性能。
3
This article presents the experimental results concerning the effects of four types of covering layers on the sound absorptive property of a fiberglass board.