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从中可得到菲涅耳衍射区的许多特性。
It is shown that many properties of diffraction in the Fresnel region can be obtained.
通过细丝后在其后菲涅耳衍射区留下阴影，测量阴影宽度可得细丝直径；
The diameter of a thin wire was obtained by measuring the shadow in the Fresnel diffraction zone.
糯米粉经羟丙基化变性后，颗粒形貌和X -光衍射图样发生变化，结晶区被削弱。
The changes of morphology, X-ray diffraction pattern and weaken of crystalline structure of the granules took place when the glutinous rice flour was hydroxypropylated.
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