Lub Yim Hli 16 txog Lub Yim Hli 17th, Oilbayer tau koom nrog hauv kev lag luam tus qauv ntawm "Oil Well Cement Performance Requirements" los ntawm National Oil and Gas Standardization Committee Drilling Engineering Sub-Technical Committee hauv Yichun City, Heilongjiang Province, thiab koom nrog kev sib pauv ntawm cov cementing. tshuab.
Post lub sij hawm: Sep-10-2018