SEMW was founded in 1921. SEMW principally engage in design develop, manufacture and sales of Diesel Hammers and Special Pilling rigs.

SEMW is leader company for Diesel Hammer Production in the world. SEMW introduce DELMAG technology to produce diesel pile hammer and SEMW have succesfully designed and developed D128, D138, D160 and D220 which makes Chinese diesel hammer reaches advanced international level regarding designation and Fabrication DH558 hydraulic pile Fidmc, the technology of which introduced from Nippon Shario Japan.

SEMW awarded ISO9001 and CE certification for all products. Besides domestic market leadership, SEMW exports USA, ASIA, Middle East, Europe and SEMW is the worldwide Market leader in Diesel Pile Hammer Production and sales.