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downhole deployment valve
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stresses
dril.
забойный клапан
(DDV
Major Tom
)
;
забойный клапан DDV
(
MichaelBurov
)
;
забойный клапан DDV™
(
MichaelBurov
)
O&G
забойный клапан DDVT
(
MichaelBurov
)
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