... insulation 绝缘/绝缘体/绝热/隔离 insulation covering 绝缘套 insulation fault detecting instrument 绝缘损坏检示仪表 ...
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thermal insulation covering materials 外覆盖保温材料
bark covering for sound insulation 隔音板
Roof covering heat insulation 屋面绝热
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insulation sleeve
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