... ,costing and heating treatment workshops AnShan Ying Yat Trade Co., Ltd and AnShan HongMing Metallurgical Machinery Co., Ltd is a comprehensive group ... There are subsidiary divisions consist of forging, casting, heat treatment, machining, and structural rivet welding in our company. ... and kinds of smelting electric furnace in our heat treatment branch factory. In this case, quenching, annealing, ...