grooved roller

China Petroleum Pipeline Bureau undertook six bid sections,totally 1 071 km pipeline construction tasks,applying the laying method of lowering-in using rolling cradle.

中国石油天然气管道局首次从事如此大直径的管道项目,承揽了6个标段共1071km的施工任务,施工中采用了滚轮吊篮下沟技术,取得了较好的效果。