Petroleum, gas and chemical process operators monitor and operate petroleum, petrochemical and chemical plants and monitor, adjust and maintain processing units and equipment in these plants.
石油，天然气和化工工艺操作员监控和经营石油，石化和化工厂并且监控，调整和维护这些工厂的处理元件和设备。
Used for Marine engineering, chemical and hydrocarbon processing equipment, valves, pumps, shafts, fittings, fasteners and heat exchangers.
通常用于船舶工程、化学制品和碳氢化合物加工设备、阀门、泵、传动轴、配件、紧固件和热交换器。
In the iron and steel industry based on the heavy machinery manufacturing, chemical, atomic energy, electrical equipment, metal processing machinery and transportation industries.
在钢铁工业基础上，建立了重型机器制造、化学、原子能、电气器材、金属加工和运输机械等工业。
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