Categories for many manufacturing services are found elsewhere in ODP. Please do a search before submitting to Business/Industries/Manufacturing/Services. Some relevant categories which may be suitable for your site are:

Business/Industries/Manufacturing/Casting,_Molding,_Machining/Machine_Shops/ Business/Industries/Manufacturing/Casting,_Molding,_Machining/Plating_and_Metal_Finishing/ Business/Industries/Manufacturing/Casting,_Molding,_Machining/Surface_Treating/ Business/Industries/Manufacturing/Factory_Automation/Integrators/ Business/Industries/Manufacturing/Fluid_and_Gas_Control/ Business/Industries/Construction_and_Maintenance/Consulting/ Business/Industries/Engineering/ Business/Industries/Import_and_Export/Agents/