来自MSN3 个月
Here's what China launched to orbit on its retrievable satellite last month (video)
China has revealed the payloads it sent to space recently on the two-week-long Shijian-19 retrievable satellite mission. Shijian-19 launched on a Long March 2D rocket from Jiuquan Satellite Launch ...
oedigital.com2 天
Halliburton Unveils Next-Gen EcoStar® Electric Safety Valve, Advancing Well Safety and ...
Halliburton Company launched the new EcoStar electric tubing-retrievable safety valve (eTRSV). This second-generation product ...