国产免费高清在线 , a视频免费观看 , 云端之上电影完整版在线观看 , 天梯电影在线观看完整版,www.九色,97人人爱人人,韩国国产在线

Casus Products>> Casus

  The QB30 produced by XINGTAI STEEL has the advantages of stable chemical composition, high surface quality, small decarburization layer and high steel purity. A customer of Xinggang used this product to produce 10.9 grade high strength bolts for engines to replace the imported materials from Germany. The customer said that the QB30 of XINGTAI STEEL was stable in quality and met the requirements of use.