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trillion cubic feet
gen. 万亿立方英尺; 万亿英尺3; 百京立方英尺; 百亿亿英尺3
earth.sc. 兆立方英尺
oil 美,法万亿立方英尺; 英,德百亿亿立方英尺; 万亿立方英尺 (Tcf)
trillion cubic feet: 4 phrases in 2 subjects
Mining1
Oil / petroleum3