日韩欧美在线视频免费,黄色国产91,欧美日韩亚洲国产,最近中文字幕在线,性高爱久久久久久久久,亚洲精品午夜不卡,一区二区三区福利视频

Main Products
Products Grade: 30Si,35Si,30MnSi,30MnSiB
Specifications: φ5.5~16mm
Applied Standard:  Q/XG 02
Characteristics: This kind of products is mostly used to produce PC bars for tubular piles with delayed-fracture resistance, good straightness, high strength and toughness, low relaxation, good heading quality and weldability to satisfy the customers’ needs.
Applications: PC steelbar steel
Use of Products: This kind of products has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality, consistent mechanical property, fine grain size etc.