Shanghai Guanbo Machinery Equipment Co., Ltd is one of the leading manufacturers of loading and unloading machines, specialized in ---grabs, port machinery, metallurgical machinery, grab buckets and clamps. GBM owns a strong R&D team comprised of engineers graduated from Germany with provable practical experience, offering to design and manufacture all kinds of loading and unloading machines. Our strict production process and quality assurance system guarantee to provide most efficient and cost