An insulating lining for an aperture through which a conductor passes.
绝缘''.'套管'.''为导体的通过提供缝隙的绝缘''.'套管'. ''.
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Light - coal Cordierite is widely used as inner insulating lining for air stove, furnace, coke oven, pit.
堇青石质煤轻砖用于热风炉 、 加热炉 、 焦炉 、 均热炉内衬隔热保温.
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