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1·Satisfy the forming requirements of two ends reducing elbow fitting.

适合异径弯头双头成型加工需要。

2·The disadvantages are less clear - some experts argue that reducing weight increases the amount of shock transferred to the wrist, elbow and shoulder.

他的缺点相对不是很明确。一些“专家”争论的是减少拍重之后随之增加的震动传递到腕、肘和肩。