久久中文字幕一区二区三区,日本99热,高清av一区,日韩狠狠操,久久久一本精品99久久精品66,1级片网站,aaaaaaa欧美黄色大片

Main Products
Products Grade: 2Cr13A
Specifications: Φ5.5-16mm
Applied Standard:  agreement
Characteristics: bearing
Applications: Axial
Use of Products: 2Cr13A is martensitic stainless steel, it have good toughness and machining after annealing. Which also possess high hardness and strength after quenching. moreover, 2Cr13A have good corrosion-resistance and abrasive resistance.