... heat to 300 °C. Usually used to solve complex sealing problems of the environment, nearly a hundred times higher price ... ordinary rubber material is very expensive, of course, good sealing effect, and can be used in a very strict ... ju4 si4 fu2 yi3 xi1 zai4) industry, aviation, electrical, chemical, mechanical, instrumentation, metal surface treatment, medicine, food, metallurgy smelting, hydraulic ...