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。
This machine is a special equipment for processing all types of waterspouts and grooves for gas-pressure balance of plastic door and window.
本机是加工塑料门窗各种类型排水槽及气压平衡槽的专用设备。
This machine is a special equipment for processing all types of waterspouts and grooves for gas-pressure balance of plastic door and window.
本机是加工塑料门窗各种类型排水槽及气压平衡槽的专用设备。
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