美东山东同乡会举办首届美国孔子国际文化节
百度 各项技术并行发展颗粒粒径或粒度分布的检测方法种类繁多,按照测量原理主要有7类技术分支,包括:筛分法、沉降法、显微图像法、光散射法、电阻法、静电法和超声法。
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