Wear-resistant technique and it application in wood cutting tool is also introduced in this paper.
介绍了国内外刀具抗磨技术的研究现状及在木工刀具中的应用情况。
This paper studied effect of gene of insect-resistant on cotton economic character .
而杨树抗虫基因工程为解决这个难题提供了一条有效途径。
Paper that is soaked in oil to make it transparent and water-resistant.
用油浸泡过的半透明的防水纸。
Paper that is soaked in oil to make it transparent and water-resistant.
用油浸泡过的半透明的防水纸。
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