With structural design of the hoist jib, analysis and calculation are made in such aspects as material, type of the box type section, and the local stability of the web plate.
结合起重机吊臂的结构设计，从材料、箱形截面的形式及其腹板的局部稳定性等方面对伸缩臂进行了分析、计算。
The performance of the box-type solar collector was investigated experimentally, the cover of which is a high-vacuum plane glass plate with a middle narrow slot.
用窄缝高真空平面玻璃作普通箱式太阳灶的透明盖板，对箱式太阳灶的集热性能进行了实验研究。
The blade in the intermediate shaft adopts box plate type structure, to improve production efficiency; the blade adopts Q345 wear-resistant material, to extend the service life.
中间轴上叶片采用箱板式结构，提高生产效率，叶片材质采用Q 345耐磨，延长使用寿命。
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