... have 15 years producing experience 3, Supper safety device Construction machinery1. With ISO9001:2000 certificate2, We have 15 ... center57 balance boom tip to slewing center17 overall weight structure weight free stylet55.27 adhered style102.23 counter ... 40 electricity parameter Yatai Heavy Industry, China national appointed construction machinery manufacturer, 1,000,000 square meters, three factories ...