半工业选矿试样一般有三大特点：质量大、矿岩石样粒度大及控制送样品位难度大。
There are usually three main features about the pilot plant test sample:large mass and large grain size of samples, difficulty to control the sample grade.
分析了连铸中间罐试样的代表性和准确性，提出控制质量稳定性的建议。
By analyse the veracity and representative of the molten steel sample, the methods improving quality stability of billet were proposed.
质量控制样品是从实验室外部获得，用于通过外部准备的测试样品来检查实验室的检测能力。
The QCS is obtained from a source external to the laboratory, and is used to check laboratory performance with externally prepared test materials.
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