Process of producing water-repellent gypsum sheathing board
作者： Thomas P Camp
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lens.org 参考文章(4)
Harold L Levin, Waterproof board and method of preparing same ,(1928)
William H Mason, Water-resistant fiber product and process of manufacture ,(1928)
William C. Lodge, Paper product and process of making same ,(1933)
Lloyd L Dodge, Paper and method of making same ,(1933)