low-symmetry crystal system 低对称晶系
phase of low crystal symmetry 低结晶对称相
crystal of low symmetry 低对称性晶体
The present paper discussed some possible translational types in detail, and derived the elements of the pseudo-symmetry for the low symmetry crystal systems (74 space groups).
本文着重分析了可能出现的平移赝对称形式，并以低级晶系所属的74个空间群为例导出了赝对称形式。
Some combinations of simultaneous equations for obtaining lattice constants of low-symmetry crystal systems can lead to a serious accumulation of errors and the formation of abnormal state equations.
求解低对称晶系晶胞参数的联立方程组的某些组合可使误差严重积累，构成病态方程组。
The optical element forms dual mode structure in low symmetry. The invention raises structural performance band gap of photon crystal, and obtains even structure of photon crystal in large area.
能形成低对称性的双模结构，有利于光子晶体带隙结构性能的提高，获得大面积均匀的光子晶体结构。
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