About Xu Yingjun
About 長慶油田第十二采油厂,甘粛 慶陽,745000
About Keji Chuangxin yu Yingyong
About oil production
About safety
About oil field
About stratum
About petroleum
About exploration(ore deposit)
About mining operations
About quality
About 自噴
About Oil production and gas production in general
About Extracting method
About 油田
About 採油
About プロセス