熔模铸造外壳及心材、铸造厂用的耐火材料涂层、耐火绝缘材料、特种耐火材料。
Casting mould casing and core, coating for refractory material, refractory insulating material, special refractory material.
在特殊情况下，要求传感器、引线的保护层与变送器外壳及地保持电气绝缘。
Under special circumstance, it is required that the sensor, protective layer of lead wire and the variable conveyor casing shall be electrically insulated from the ground.
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