1) Surface treatment:zine coated,sand blasting 2) Excellent and high quality control,advanced producing equipments 1) Surface treatment:zine coated,sand blasting.2) Excellent and high quality control,advanced producing equipments and good control system.3) Prompt delivery time.4)Gear:Rear gear:34T,35T,36T,37T,56T,57T etc. Front gear:13T,14T,15T,16T..............5) Treatment: High frequency ...
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