■材質:鋅合金主體、鋼鐵擋片 ■Material: Body-Zinc alloy、Cam-Steel??? ■表面處理:黑色電著主體,鍍鋅擋片 ■S.Tr:Black coated,Cam-zinc plated? ■Easy grip adjustment? ■Reduce or eliminate noise and rattles cause by vibratio ■The cam could compression 7m/m,to improve strength and tightly close for use
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