| 1. | It is praised as permanent heat insulating material with no need of renewal because it is not only safe but also durable in rigor condition of low and cryogenic temperature , underground , open air , flammability , moisture sensitivity and even chemical erosion
它在低温深冷地下露天易燃易潮以及化学侵蚀等苛刻环境下使用时，不但安全可靠，而且经久耐用，被誉为“不需更换的永久隔热材料” 。 |
