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。
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。
The results showed that the grading bamboo strand lamination is a low-swelling material. The swelling of parallel to grain, radial and tangential is lower than that of timber and LVL.
结果表明：竹层积材是一种低湿胀性材料，顺纹、径向和弦向上均远低于木材和LVL。
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