ความคิดเห็นที่ 1 In order to further augment the effectiveness of a gas (such as air), it may be disrupted into small cells, which cannot effectively transfer heat by natural convection. expanding foam Buffalo | | โดย: Smithylife87@gmail.com [7 พ.ค. 64 13:17] ( IP A:172.17.0.1 X: ) |  |
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