prefabricated plant meaning in English

产品加工船

When the prefabricated plant is under the viaduct , the monolithic box girder is lifted by the gantry crane and transported by the special rotary traversed platform , and then transported and erected by the bridge girder transporting and erecting machine
当预制梁场设在高架桥下时，采用提梁机提起整孔箱梁，通过特制旋转式横移平台喂梁，运架一体式架桥机运梁和架梁。