Hangzhou HeDi mechanical& electrical engineering Ltd. is a professional manufacturer for pre-stressed concrete cylinder pipe(PCCP)making machine.It belongs to China State Power Machinery Research & Design Institute. With over 40 years research& developing, HeDi provides excellent equipments for China big projects such as as " South Water to North" and " Three Gorges "project, which made a big contribution for drinking-water project&irrigation tunnel. It's also certified in the ISO9001 (1994/2000) and the environment controlling systemISO14001(1996).HeDi co. is mainly engaged in the following equipments: 1large concrete mixing device: fixed concrete mixing device(station)mariner botching plant2power station refrigeration system3prestressed concrote pipe-equipment