欧美日韩国产精品久久电影_国产精品一区二区三区毛片_暖暖 免费 日本 在线观看1_幻女free性zozo交体内谢深喉_欧美黄色一级性视频_可以直接看黄的网站_欧美日韩人妻高清中文_1024AV日韩精品在线_在线成年视频人网站观看_不卡免费a级毛片无码∨最熱門最齊全電影!

GZB10B cold-rolled ribbed reinforced molding technology parameters of the unit:
1, high hardness, wear resistance, long service life;
2, products ribbed clear, precise size, beautiful appearance;
3, the strength of the reinforcement and comprehensive performance improved, can fully meet the national skills supervision bureau issued "GB13788-92 cold rolled ribbed steel bar" standard;
4, reduce the frequency conversion, and improve the production efficiency, reduce production costs.