Calcination of petroleum coke can yield almost pure carbon or artificial graphite suitable for production of electrodes, motor brushes, dry cells, etc.

石油焦的煅烧可产出几乎纯的碳或人造石墨，适于生产电极、电机刷和干电池等。

youdao

Rod pumping is a main artificial lift oil production method in petroleum industry.

有杆泵采油是石油工业传统而占主导地位的人工举升采油方式。

youdao

Article 2 the fuel gas referred to in these Regulations means the gas fuel such as artificial coal gas, natural gas, and liquefied petroleum gas hereinafter called LPG.

第二条本条例所称燃气，是指人工煤气、天然气、液化石油气(以下简称液化气)等气体燃料。

youdao

Tastes are changing too: Twinkie the Kid might have been made from petroleum byproducts and artificial ingredients, but he died a natural death.

FORBES: Staggering Global Food Waste Creates Green Tech Opportunities