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。

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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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Onshore natural gas transmission compression means any combination of compressors and associated equipment involved in moving natural gas from production fields or natural gas processing plants through transmission pipelines to natural gas distribution pipelines and storage facilities.

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