General Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC
General Machinery Plant of Liaohe Petroleum Exploration Bureau of CNPC Patent applications | ||
Patent application number | Title | Published |
---|---|---|
20120175007 | Pre-Sressed Insulated Tubing - The present invention relates to a pre-stressed insulated tubing, including an inner tube ( | 07-12-2012 |