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drill pipe float valve
stresses
O&G
поплавковый клапан бурильных труб
(
Johnny Bravo
)
O&G, oilfield.
обратный клапан бурильной колонны
drill-pipe float valve
O&G
обратный клапан бурильной колонны
tech.
обратный клапан в бурильных трубах
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