China's domestically developed C919 passenger jet has undergone all the test flights for obtaining an airworthiness certificate in the country, its manufacturer Commercial Aircraft Corp of China said ...

CNPC's Baoshi Pipe successfully deployed its self-developed BJC-FJ threaded casing in Xinjiang's first 5,500m "casing-in-casing" test well. This breakthrough enables China to master high-end casing te ...