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Convex or concave transparent covering of horizontal roofs has upper film, middle film or plate and lower film or plate whose convex curvature runs toward middle film
Convex or concave transparent covering of horizontal roofs has upper film, middle film or plate and lower film or plate whose convex curvature runs toward middle film
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机译:水平屋顶的凸面或凹面透明覆盖物具有上膜,中膜或板和下膜或板,它们的凸曲率朝向中膜延伸
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摘要
Convex or concave covering of horizontal roofs has an upper film, a middle film or plate and a lower film or plate. The convex curvature of the films runs toward the middle film or plate or which runs diagonally to the middle film or plate.
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