2 Noun 0 Verb 0 Adj. 0 Adv.
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ZH六方最密堆积Noun
EN
In geometry, close-packing of equal spheres is a dense arrangement of congruent spheres in an infinite, regular arrangement.
六方密积
bn:03793125n Concept
ZH
六方晶系(英語:hexagonal crystal system),有一个6次对称轴或者6次倒转轴,该轴是晶体的直立结晶轴C轴。
六方晶系
bn:03515103n Concept