To make a casting part,we need spend more than 30 steps in completing it.
1.design_2.making tooling_3.beating_4.wax Injection_5.cleaning wax part_6.making wax stick_7.wax pattern inspection_8.assembling wax pattern_9.dipping & coating(5-6 times)_10.dewaxing_11.drying shell_12.baking shell_13.putting shell into the sand_14.melting metal material(matching grade of steel)_15.assaying_16.pouring_17.assaying after casting_18.removing surface sand_19.gas cutting_20.grinding wheel machining_21.sand blasting_22.inspecting_23.electric welding_24.annealing_25.second grinding_26.second sand blasting_27.inspecting again_28.correcting casting objection_29.preventing rust process_30.machining_31.inspecting_32.product

Please see the drawing of lost wax casting process.