实验结果表明，消光剂在水性树脂体系中表现出与溶剂型体系不同的消光规律。
Testing results showed that the matting agent in water-borne resins proved its matting rules different from those in solvent-borne resins.
引入空间群消光规律，用计算机模拟电子衍射图，提出选取约化四边形的新方法。
Adopting the space-group extinction rule and simulating the electron diffraction pattern with computer, this paper proposed a new method for selecting the reduced quadrangle.
对二维晶体的矩阵表示、对称性及其对X射线衍射的系统消光规律进行了研究，得到并证明了二维晶体的矩阵表示的二个定理和二维晶体对X射线衍射的系统消光定理。
The crystallographic problems of two-dimensional crystal, such as the matrix expression, the symmetry and the systematic absence law of the crystal's X-ray diffraction, are studied.
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