The series general-purpose bridge cranes with magnet, grab, hook carrier beam or rotary hook designed and manufactured by DHHI widely serve in port, metallurgy, energy sources, chemical industry, mine, etc. The DHQD series 10-125t general-purpose bridge cranes developed and batch produced in 2008 have many advantages such as less overall size, good interchangeability of components, energy saving and environment protection, reduction of investment at early stage of engineering construction for the customer, and meeting the individualized demands of the customer to the greatest extent, etc.