微波电子管
microwave tube
electronic microwave tube
倾斜管微压计
inclined tube micro pressure gauge
倾斜并联内螺纹管
parallel inclined rifled tube
Parallel inclined internally ribbed pipes
轻松管理有效传播
Digital Signage of ViewSonic
青海石油管理局勘探开发研究院
Research Institute of Exploration Development
Qinghai petroleum Administration Bureau
qinghai petroleum bureau
gansu
Exploration and Development Institute
qinghai petrolcum administration
青海石油管理局地质研究所
Geological Institute of Oinghai Petroleum Administration
geological institute
qinghai petroleum administration