The rules of dimension change of plastic bonded explosive PBX TATB charges during thermal cycling were studied in detail, and the methods of reducing the permanent expansion were studied.
研究了塑料粘结炸药PB X TAT B药柱在热循环过程中的尺寸变化规律，探索了减小永久性长大的方法。
With curbs on carbon emissions expected and an expansion under way into natural-gas and alternative energy, some firms are considering permanent cutbacks in their refining business.
随着有望限制碳排放，天然气和替代能源开始扩张，有些企业在考虑长期压缩炼油业务。
Two of the five current permanent Council members, China and the United States, warned against moving too fast on expansion.
5个现任常任理事国中有两个，也就是中国和美国警告不要仓促扩大安理会。
Objective To evaluate the maxillary protraction appliance permanent teeth combined rapid expansion of early bone anterior crossbite effectiveness.
目的评价前方牵引器联合快速扩弓矫治恒牙早期骨性前牙反牙合的有效性。
Objective To evaluate the maxillary protraction appliance permanent teeth combined rapid expansion of early bone anterior crossbite effectiveness.
目的评价前方牵引器联合快速扩弓矫治恒牙早期骨性前牙反牙合的有效性。
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