亚洲精品在线观看少妇,国产激情亚洲一区,国产人碰人摸人爱免费视频,久久国产精品一区二区,久久国产精品免费看,日韩欧美视频熟女,婷婷午夜电影在线观看,色婷婷国产麻豆精品,八年沉淀只做精品,国产在线视频专区,日韩欧美纯爱电视剧电影免费观看,亚洲国产日本免费观看,天堂亚洲欧美日韩一区二区,中文字幕有码系列在线观看,久久日韩精品一区,小明欧美精品视频在线观看,91av成人一区二区三区,欧美日韩亚洲综合在线一区二区,亚洲一区二区二三区日日骚,在线观看欧美一区二区三区精品,日本欧美黄色一级片,欧美av一区二区三区在线观看,91成人国产麻豆一区二区

Engineering Technology: Structural steel construction and cable-membrane material control on the quality of the membrane surface

Engineering Technology: Structural steel construction and cable-membrane material control on the quality of the membrane surface

[Student] problems and long-span cable-membrane structure steel construction on the membrane surface material quality control?
[Answer] works mainly membrane surface using PTFE coated polyester film of PVC and fiberglass Teflon film, only a handful of companies produce the material internationally. The main indicators should include material unit weight, thickness, mechanical properties, optical properties, fire resistance and durability.
Above all finishing work based on actual problems encountered students from, for reference, any questions, please timely communication, correct me.