To investigate the main aging mechanism of HTPB/TDI/MAPO polyurethane material, the aging properties were studied by accelerating aging method.
通过加速老化试验，研究了HTPB/TD I/MAPO类聚氨酯材料的老化性能，探讨了其老化机理。
The present invention discloses an ultrasonic salt atomization method for accelerating white spirit aging. The method comprehensively applies an ultrasonic atomization technology and porous material.
本发明公开了一种促进白酒陈化老熟的超声盐雾化方法，该方法综合应用了超声雾化技术与多孔材料。
As one of the consequences of the rapid demographic transition in China, the accelerating process of population aging is changing the relationship between labor supply and labor demand in urban China.
人口加速老龄化是中国人口快速转变的代价之一，城镇劳动供求形势也将因此出现重要变化。
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