简答题 翻译：The sampling device is designed to take samples from two or three different levels in the tank so that a composite sample can be collected that will be the representative of the whole tank.

【参考答案】

设计而成的取样装置可以从储油罐不同深度层次取出原油样品，这些样品混合后可以近似代表储罐中的原油。