Pu 'er raw tea bear a good storage ability as it is not treated by fermenting process etc.
普洱生茶由于没有经过渥堆发酵等工艺的处理，其耐储藏性较好。
The development process and technical keys of PU hot melt adhesive interlining were introduced.
介绍了PU热熔胶衬布的研制过程和技术关键。
The process and key points for producing PU transfer leather were described in the present paper.
论述了PU饰面皮革的生产工艺和操作要点。
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