并列式双腔气制动阀
parallel dual-chamber air brake valve
串列式双腔气制动阀
series dual -chamber air brake valve
单腔气制动阀
single-chamber air brake valve
油气田勘探开发化学
oil and gas field exploration and development chem
油气田勘探开发
Exploration and Development of Oil and Gas Field
油气田开发方案
development plan of oil and gas fields
油气田开发地质
oil and gas field development geology
油气田建设工程
oil and gas field construction engineering
油气田建设
oil and gas field construction
油气田环境保护
Environmental Protection of Oil & Gas Fields