But its grading standard is on the low side and the instruments used to test are lack in precision.

但是，它的评分标准偏低，测试仪器的准确性较差。

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The study of the hydrodynamics indicates that the reliable data of the paleocurrent can be collected through features of the size grading, low angle inclined bedding and the backward bedding.

沉积水动力学分析表明可以从槽状交错层理特征中的粒序、低角度斜层和逆向层理提取可靠的古流信息。

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Noise is small, net changers fast, grading fine, sorting larger scale, high output, sorting accuracy, low failure rate and convenient maintenance. Especially suitable for grading use.

噪音小、换网快捷、分级细、分选比例大、产量高、分选准确、故障率低、维修方便等优点。

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