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工业用同步带系列：（RUBBER & PU TIMING BELTS:MXL,XL,L,H,XH,XXH,T2.5,T5,T10,T20,AT5,AT10,AT20,3M,5M,8M,14M,20M,S2M,S3M,S4.5M,S5M,S8M,S14M,RPP3M,RPP5M,RPP8M,RPP14M...)