On the other hand, the attenuation of hightemperaturefiber used for temperature sensor is still too high for communication purpose.
主要用于传感的耐高温光纤的衰减太大，也不能用于通信。
2
Rock wool insulating tubes is basalt and other natural ore, etc as main raw materials, by hightemperature melting in a fiber, stir-in binder, curing processing and is made.
岩棉保温管是以玄武岩及其它天然矿石等为主要原料，经高温熔融成纤，加入适量粘结剂，固化加工而制成的。
3
Some natural fiber like silk, wool is not suitable for hightemperature, and cotton are too afraid.