It is needed to explain that we manufacture oilextractor for petroleum exploration instead of drilling rig.
需要说明的是：我们制造的是石油开采用的抽油机，不是钻机。
2
The invention discloses a volatile oilextractor for preparing a cigarette flavor, which belongs to the technical field of chemical extracting equipment.
本发明公开了一种制备烟用香料的挥发油提取装置，属于化学提取设备技术领域。
3
He says he learned English by listening to the radio while working as an oilextractor and repairman in the northeast, before studying English literature as an undergraduate in southeast China.