其他公司，如克瑙夫，阿姆斯特朗和三角洲，使类似的产品，他们往往费用不到玻纤从欧文斯科宁。
Other companies , such as Knauf , Armstrong , and Delta , make similar products , and they often cost less than fiberglass from Owens-Corning .
欧文斯科宁