Main boring diameter for petroleum well is 20-30 cms in diameter, while the depth of the oil well may be about __________ kms.
A. 0.1 to 0.5
B. 1.5 to 4.5
C. 7.5 to 12.5
D. 15-20
Submitted by: MuhammadOption B
Submitted by: Muhammad
Submitted by: Muhammad
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