Chemical and petrochemical plants have long displayed a preference for ductile iron because of its ability to withstand shock loads, either thermal or physical.
由于球墨铸铁具有良好的耐冲撞装卸性能，及热学和物理性能，所以长期以来，化工厂和石化企业就特别爱好使用球墨铸铁。
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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