日本NOK同步带AT5齿形AT5GEN-3齿形长度齿数AT522545AT522551AT526052AT528056AT530060AT533066AT534068AT537575AT539078AT542084AT545090AT545591AT548096AT549098AT5500100AT5525105AT5545109AT5600120AT5610122AT5620124AT5630126AT5660132AT5670134AT5690138AT5710142AT5720144AT5750150AT5780156AT5825165AT5860172AT5875175AT5900180AT5920184AT5975195AT51050210AT51125225AT51230246AT51500300AT51750350AT52000400AT53350FA**670AT53800FA**760)