97超碰人人澡人人,久久久一区二区,亚洲天堂色图片,7777精品伊人久久久大香使用方法,国产午夜一区,日韩av中文字幕一区二区,国产黄色大片儿

Casus Products>> Casus

  The QSWRCH18A produced by XINGTAI STEEL has the advantages of stable composition, low harmful elements, high purity of steel and less surface defects. The product is mainly used in the production of auto parts. A customers of XINGTAI STEEL uses this product to produce self tapping screws for automotive interior, and feedback that the product has good cold heading forming and low cracking rate, which meets the use requirements of product.