Polarization microscope, scan electronmicroscope and X ray diffractometer are applied separately to view and determine the fabric characteristics and orientated range of flat particles in samples.

本文中应用了偏光显微镜、扫描电子显微镜和X射线衍射仪分别对试样的组构特征及扁平颗粒的定向排列特征作了观察和测定。

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Flat roofs collect fallout particles so the top floor is not a good choice, nor is a floor adjacent to a neighboring flat roof.

房屋的屋顶会聚集尘降物颗粒，所以建筑物的最高一层不是躲避辐射的好地方。靠近屋顶的楼层也是如此。

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Flat versions allow sediment and particles to sweep past the measurement surface, minimizing risks of abrasion, breakage and coating.

平面型允许沉淀物、微粒掠过测量面，并可把擦伤、损坏和镀膜的危险降到最小。

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