Begin to roll the leaf from one side.
然后从一边往另一边卷起叶子。
The heredity of resistance to potato leaf roll and mosaic viruses and its relation to yield characters in potato was studied.
本文研究了马铃薯对卷叶和花叶病毒抗性的遗传及与产量性状的关系。
The most threatening grape virosises in China are grapevine fan leaf disease, grapevine leaf roll, grapevine stem pitting and grapevine corky bark.
我国葡萄最具威胁性的病毒病有扇叶病、卷叶病、茎痘病和栓皮病。
Using DAS-ELISA method detected grapevine fan leaf virus and leaf roll virus of main varieties growing in Gansu.
采用DAS - ELISA检测方法对甘肃地区的葡萄主要品种进行扇叶病毒和卷叶病毒的调查和测定。
The rate of roll leaf caused by Cnaphalocrocis medinalis was about 2 times of that in monoculture paddy-field;
稻纵卷叶螟为害较重，卷叶率是常规非防治稻田的2倍左右；
Roll forgings. In roll forging, a bar stock, round or flat is placed between die rollers which reduces the cross-section and increases the length to form parts such as axles, leaf springs etc.
在滚锻时，圆的或是扁平的棒料放在模辊之间缩小横截面增加长度制成诸如轮轴、板簧之类的零件。
This paper presents the design method of, the roll contour of roll-forging dies for the parabolic variable section leaf spring, as well as the calculation verification.
介绍了抛物线形变截面板簧辊锻模辊形曲线的设计方法，并通过计算加以验证。
This paper presents the design method of, the roll contour of roll-forging dies for the parabolic variable section leaf spring, as well as the calculation verification.
介绍了抛物线形变截面板簧辊锻模辊形曲线的设计方法，并通过计算加以验证。
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