国产性交a级毛片-久久久久久免费一级A片-一级黄色视频播放片区-有没有一级黄色网-黄色一级毛片91视频-我要看一级黄片免费的-欧美成人黄色一级-日韩高清一级黄毛片-黄色一级.a片视频

Nanjing Lianqun Pig Building Project

Nanjing Lianqun Building Pig Farm project is the new key project of Nanjing Huiyuan Company. The project is a comprehensive pig house for 36,000 pigs.  As the equipment supplier of the project, big Herdsman is responsible for the environmental control system, feeding system, air filtration system, deodorization system, washing system and dung removal system of the project.  At present, the project is being completed in an orderly manner and will become a benchmark project for the building fattening pig farm in Nanjing.