A representation, the model standard gantry cranes code, rated the quality of the span, working-level features four main elements represented models. Second, single girder gantry crane its symbol has: MDG, MDE, MDZ, MDN, MDP, MDS. Such as: MDN- single girder trolley single grab gantry crane hook; MDS- single girder trolley with three gantry cranes. Third, the dual-beam gantry crane has its symbols: MG, ME, MZ, MC, MP, MS. Such as: MG- double girder gantry crane hook single trolley; ME- double girder gantry crane hook double trolley. Reference Standard GB 191 packaging Pictorial marking basic form GB 699 high-quality carbon steel structural conditions GB 700 GB 783 carbon steel cranes up to GB 985 Series gas welding, SMAW and GMAW welding groove and dimensions GB 986 submerged arc weld groove basic forms and sizes round strand wire rope GB 1102 400 450t gantry crane gantry crane, gantry Jilin, generous heavy Ltd provided by generous heavy machinery in Henan Province. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) strong, credible, in Zhengzhou, Henan engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving generous innovative ideas will lead into the brilliant heavy and you work for a better future!