亚洲色图视频区无码|日本人妻少妇一区二区|人人爽人人爽人人片AV|久久精品99国产这有精品|日韩美女黄色视频一区二区|欧美日韩精品国产一区在线|亚洲香蕉网久久综合影院小说|亚洲v日韩v欧美高清在线观看

ABOUT PRODUCTS
Compared with plastic formwork, which is more economical?
2018-10-23

Both belong to template materials with low strength and rigidity, and low turnover rate, but the cost is relatively low.Because of different uses, it can not be compared: wood plywood has low cost, can be processed, low turnover rate, can not help blisters, if If the distance between the small keels is large, and the pressure on the concrete side is large, its own stiffness is low, and bending deformation or even expansion will occur.Generally, the appearance quality of concrete such as foundation slabs or slope roofs is not high or there is no large turnover at a time. Used for parts; plastic formwork is generally shaped, such as the plastic formwork in the multi-ribbed floor, is a formwork for specific structures, and can be rented.