Window Opening
窗户洞口
窗开度
井下套管磨开孔
井架未加遮挡部分
井架大门
窗口
window opening and lateral drilling
Window Opening and Sidetrack Drilling
window wide window level
high deviated well and horizontal well
SLCORE-I well main well
well pipe and well point drawdown
2008 Beijing Olympic Ceremony Opening
30 years after the Reform and Opening Up
30 years of Chinese Reform and Opening
30 Years of Reform and Opening
30 years since the introduction of reform and opening up
30 Years’ Reform and Opening
3-D square opening cavity flow
accelerated the opening of the mainland market