Two types of viral symmetry have been recognized , the cubical symmetry and helical symmetry .
已经证实病毒有两种对称型，即立体对称和螺旋对称。
Study on the Parameters of the Capsid of Helical Symmetry Virus
螺旋对称病毒衣壳参数的研究
helical symmetryhelical symmetryhelical symmetry