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Ningbo Chengyu Construction Machinery Co., Ltd. is a factory specializing in heat treatment for several decades,producing various hammer accessory machinery and excavator parts manufacturing.We are expert in design,development,production,and export’s professional co***ny.We using domestic and international advanced production equipment and metal materials to produce the high quality parts.At present,users over the railways, highways, utilities, municipalities, ports, oil and mining industries. Our main prod...
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