国产又色又爽又剌激的视频,边摸边吃奶边做GIF视频免费 ,亚洲综合国产一区二区三区,亚洲av无码av专区在线观看

Quality assurance system: The company has quality inspection team, digital real-time imaging system, imported system helium leak detection station, German density equivalent instrument, spectrum analyzer, Hexagon three coordinates, tensile testing machine, hardness machine, X-ray lossless Inspection machine, etc..In the research and design process of molds and products, we use the genuine German Siemens industrial software NX and Procast casting mold system software for auxiliary optimized design. Our production process is in accordance with the 6S modern management to achieve the whole process control. The company has passed ISO9001, IATF16949, SVTI and other international quality management system certification.