亚洲色图欧美色,久久不射电影,欧美激情手机在线,好看的一级毛片,亚洲狼人区,天天爱天天做天天爽,91欧美日韩

Main Products
Products Grade: ML45Mn2
Specifications: Φ14~38mm
Applied Standard:  agreement
Characteristics: or manufacturing rivet of boxcar.
Applications: Fastener steel
Use of Products: uniform-chemical composition, low percentage of harmful elements, high purity, slight decarburisation, good surface quality,are commen steel grade .After spheroidize annealing, this product has characteristics of good cold heading properties ,stable heat-treatment properties, good hardenability.