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HTR reserves
abbr.
challenged reserves
(
MichaelBurov
)
;
difficult oil
(
MichaelBurov
)
;
hard to recover reserves
(
MichaelBurov
)
;
hard-to-recover reserves
(
MichaelBurov
)
abbr., O&G
HTR
(
MichaelBurov
)
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