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近年来,以压缩空气为能源的气动技术不断推广应用,需要大量气动控制元件。为了适应这个要求,上海长红机械配件厂在原来基础
In recent years, compressed air as the energy source of pneumatic technology continue to promote the use of a large number of pneumatic control components. In order to meet this requirement, Shanghai Changhong Machinery Parts Factory in the original basis