... ultra-deep exploration ==> 超深勘探 ultra-deep mining ==> 超深开采 ultra-divisor ==> 超因子 ...
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开采这些超深的油矿沉积层所需的钻探压力是开采海上石油正常压力的三倍。
These ultra-deep deposits must be drilled at up to three times the normal pressure for offshore oil.
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