Aukuso 16th ia Aukuso 17th, Oilbayer auai i le tulaga alamanuia o "Oil Well Sima Faatinoga Manaoga" faatulagaina e le National Oil ma Gas Standardization Komiti Drilling Inisinia Sub-Technical Komiti i Yichun City, Heilongjiang Province, ma auai i le fesuiaiga o sima fesootai. tekinolosi.
Taimi meli: Sep-10-2018