protective insulation

EPDM ( Ethylene Propylene Diene Monomer) is used as the insulation on chamber wall of SPRM. It is a good protective material of charring type. During being heated it formed the charring and pyrolytic layers.

作为固体火箭发动机燃烧室壁面绝热层的EPDM是一种炭化型热防护材料，受热时形成炭化层和热解层，在燃气和粒子冲蚀下不断减薄并带走热量，有效地保护燃烧室壁。

One end of the protective casing is provided with a flaring for the butt-joint of the heat-insulation case.

在保护套的一端设有扩口，用于保温套间的对接。

This article analyses the reasons of the failure under external pressure of inner press vessel that in cryogenic vacuum storage tank with powder insulation, and the protective measures ought to be adopted.

本文对真空粉末绝热低温液体贮槽内容器受外压失效的原因进行了探讨。制造过程中，在真空夹层充氮置换和气压试验时，要对内容器采取安全承受外压的保护措施。

Parts connected by protective impedance shall be separated by double insulation or reinforced insulation.

应采用双重绝缘或加强绝缘将由保护阻抗连接的各个部件隔开.

It is an important technical problem to neutral grounding mode of the electric power system which associates with voltage level, network structure, and insulation level, reliability of power supply, protective relaying, electromagnetic interference, and personal safety.

电网的中性点接地与电压等级，网路结构、继电保护的状况、电网的绝缘水平、供电可靠性要求等都紧密相关。