久久久久久国产一区二区三区,天天狠天天操,国产乱码久久久久久一区二区,黄色短视频免费观看,日日噜噜夜夜爽狠狠视频 ,午夜激情啪啪,不卡的av电影在线

Main Products
Products Grade: ML15Cr
Specifications: φ8~14mm
Applied Standard:  agreement
Characteristics: It’s used to produce automotive engine parts.
Applications: Common partsCommon fastener
Use of Products: This product has characteristics of uniform-chemicalcomposition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality. After spheroidize annealing, this product has characteristics of good cold heading properties ,stable heat-treatment properties and good hardenability.