Harbin North General Mec.& Elec. Engineering Co.,Ltd is professional in grain storage equipment production as a hi-tech enterprise .Assembly steel structure heat-preservation barn(grain silo) ,which is self-developed and manufactured by the company with self-determined intellectual property, improves the performance of barn and get rid of the traditional construction mode ,at the same time ,advancing the rate of performance and price in quality .It is widely praised in practical application and has been awarded more than ten national patents ,which fills up the gap of steel structure heat preservation barn in China ,standing for the developing direction of barns today .