oilfield,

aker bp, a partner in norway's giant johan sverdrup oilfield
gost632-80/api 5ct 5" btc seamless casing and tube for oilfield
industry oilfield people and development concept - black
预订 oilfield processing: crude oil v. 2 [9780878143542]
this is not a drill: just another glorious day in the oilfield