JWB-50 transportation winch has good blast protection property andbraking property, big cope capacity, long longevity and hightransmission efficiency.
JWB-50型运输绞车具有良好的防爆性能和制动性能，容绳量大、适用条件强、使用寿命长、传动效率高等特点。
Finally, we provide an overview of the project and its potential applications and draw our conclusions that it is feasible to develop the JWB series stepless cable winch.
最后，通过对项目的总体描述和应用前景进行分析得出结论，认为实施JWB系列无级绳绞车研制的方案是可行的。
The main results were as follows: 1. Observed a great deal of JWB plantlet, we found that, small leaves, short burl distance, thin stem, more axillary bud, stipule thorn became leaves bigger, is the JWB representative symptom;
1对枣疯病组培苗的观察结果发现，叶片小，节间距短，茎细，腋芽萌发多，托时刺退化成的小叶大是组培苗发生枣疯病的典型症状；
The Jujube witches'broom disease (JWB) caused by phytoplasma has brought much economic damage to jujube production in our country.
由植原体引起的枣疯病在我国分布普遍，危害严重，使我国的枣树生产遭到极大的经济损失。
Selecting cultivars with high resistance was regarded as the most powerful method to eradicate JWB and had made some progress, but the mechanism of resistance was still in its beginning stage.
抗枣疯病品种的选育已经取得了一些进展，但抗病机制研究尚处于起步阶段。