中文字幕精品一区二区精品,乱码av午夜噜噜噜噜一,日韩精品久久久久久久电影竹菊,欧美一区二区三区在线播放,日韩av中文字幕在线,久久r久久,亚洲男人天堂2024

Main Products
Products Grade: 65Mn
Specifications: φ5.5~14mm
Applied Standard:  GB/T4354
Characteristics: The product is a common spring steel with extensive applications. It mainly used to manufacture cushion spring, clockwork spring, oil pump speed adjusting spring, plunger spring, absorber spring, clutch spring and brake spring etc.
Applications: Spring steel
Use of Products: This product has characteristics of good metallurgical quality such as high purity and uniformity, good surface quality by strictly controlling surface defect and decarburization, good mechanical properties especially on elastic limit, strength limit and tensile ratio, as well as accurate shape and dimension.