用活动金属挡板及水封井附加控制阀门封闭油罐组排水沟的方法既不可靠又会使流淌火面积扩大。
The method using movable metal baffle and control valve near water sealed well to block the drain of oil tank group is unreliable and it will widen flowing fire area.
管道、阀门和水封装置冻结时，只能用热水或蒸汽加热解冻，严禁使用明火烘烤。
When Pipes, valves and water seal equipments is freezing, only hot water or steam heating can be use to thaw, and open fire is prohibited.
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