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: SCM420
Specifications: φ5.5~38mm
Applied Standard:  agreement
Characteristics: It's used to produce the engine vavle push rod.
Applications: Common partsCommon fastener
Use of Products: This product has characteristics of uniform-chemical composition, low percentage of harmful elements, high purity, good surface quality. After spheroidize annealing, this product has the characteristics of good cold heading properties. And the product has excellent hardenability.