Measure in attics and crawl spaces for insulation and ductwork.
衡量阁楼和管道crawlspaces绝缘和.
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Sheet metal ductwork and specialties, complete with insulation, and dampers in accordance with drawings and specifications.
与图纸和规格相符的完全绝缘的金属片管路 、 特殊金属和阻尼器.
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