Lateral force can not brush back and forth otherwise they will damage gums.
不可横向来回用力刷，否则会损伤牙龈。
Lateral internal force calculation of box girder still lacks accurate effective and simple method.
箱梁横向内力的计算目前还缺乏精确有效的简化方法。
Lateral internal force calculation of box girder still lacks accurate effective and simple method.
箱梁横向内力的计算目前还缺乏精确有效的简化方法。
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