实践表明，卸槽潜油泵法是火车槽车负压卸油系统改造的最理想方法。
Field application shows that an immersible pump method is the most ideal method for the oil vacuum unloading system of rail tank wag.
实践表明，卸槽潜油泵法是火车槽车负压卸油系统改造的最理想方法。
Field application shows that an immersible pump method is the most ideal method for the oil vacuum unloading system of rail tank wag.
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