中韩高清无专码区2021曰_色翁荡熄又大又硬又粗又视频图片_波多野结衣乳巨码无在线观看_国产91福利在线播放_国产人妻人伦精品_马来西亚潜水天堂_黄色免费网站下载_免费看黄网站黄污污污热门软件_小莹客厅激情46章至50章视频

Our factory is a specialized manufacturer of vacuum equipment, with strong technical capabilities. We possess a complete set of advanced equipment for casting, metal processing, assembly, and testing, as well as a comprehensive management system. In particular, our casting process utilizes advanced coreless medium-frequency induction furnaces, which effectively control the chemical composition of molten iron and ensure the stability of product materials. Our main products include slide valve vacuum pumps, water ring vacuum pumps, Roots vacuum pumps, rotary vane vacuum pumps, and various vacuum units. Our products are well-selling across the country and widely used in fields such as food, metallurgy, chemical industry, pharmaceuticals, refrigeration, aviation, aerospace, electronics, and national defense research.