国产精品一区二区三在线观看-人妻互换精品一区二区三区-日本美女久久久性爱视频-亚洲精品免费福利午夜

the company has advanced production equipment and technology, punching line, efficiency of the industry's leading ceramic tube drive gas furnace, workpiece heat quenching process. reciprocating air assisted electrostatic spray gun automatic spraying equipment, spraying, paint selection of advanced gas oven drying curing, transmission cooling process. wooden handle processing, assembly and production of one-stop mechanization degree of 100%. standardized steel spade testing equipment and quality control system, the quality reaches and exceeds the national industry standards, and enjoys a high reputation at home and abroad.