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.

中國石油天然氣管道局首次從事如此大直徑的管道項目,承攬了6個標段共1071km的施工任務,施工中采用了滾輪吊籃下溝技術,取得了較好的效果。