For citations:
Marfitsyn S.V., Marfitsyn А.V., Marfitsyn V.P. THE DEVICE WELLHEAD CONTROL VALVE FOR GAS PRODUCTION WELLS. Oil and Gas Studies. 2018;(6):119-123. (In Russ.) https://doi.org/10.31660/0445-0108-2018-6-119-123
Marfitsyn S.V., Marfitsyn А.V., Marfitsyn V.P. THE DEVICE WELLHEAD CONTROL VALVE FOR GAS PRODUCTION WELLS. Oil and Gas Studies. 2018;(6):119-123. (In Russ.) https://doi.org/10.31660/0445-0108-2018-6-119-123