They have spawned a diverse array of smaller companies that play a supporting role, supplying parts and assemblies, performing machining operations, and making tools, jigs and fixtures. Everything the bigger plants need can be sourced from suppliers within 30 kilometers. Planning to manufacture a lathe?
上萬家的機械產業螞蟻雄兵中，以生產工具機和木工機、製鞋機的大廠為中心，發展出零組件、加工、模具等各類衛星工廠，30 公里方圓內，應有盡有。