In the second part, the difference of modal strain is introduced.
第二部分提出振型应变差的概念。
Weld-seam position and thickness difference do not affect stress and strain states.
焊缝位置和壁厚差异变化时，拼焊管各区域的应力状态保持不变。
Aim: To research oral streptococci strain gene identification and compare their difference.
目的：探讨口腔链球菌基因分型，比较细菌相互间基因差异。
Aim: To research oral streptococci strain gene identification and compare their difference.
目的：探讨口腔链球菌基因分型，比较细菌相互间基因差异。
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