有人打开了石油的主要阀门，导致油厂内的石油倾泻而出。
The oil stored in tanks in a former refinery was sabotaged when someone opened the main valve.
订购时，请在主要阀门型号代码的上添加杠杆执行器代码。
To order, add the lever actuator code to the basic valve order code.
材料证书—如果用户要求，可以提供主要阀门部件完整的化学和物理特性资料。
Material certification-when specified, complete chemical and physical properties of major valve components can be supplied.
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