此外，还分析了在该土槽上所进行的机耕船用楔形轮与无轮缘叶片轮的牵引特性的对比试验。
By means of the bin, a comparative test of tractive performance between the wedged paddle wheels and nonrim ones ofpaddy-field tractor(P. F. T. ) is analysed.
分析了火炮身管大缠角混合膛线的成型过程，提出圆锥体单边切进楔形工作齿的阴极结构，经试验确定了阴极体锥度、长度与楔形工作齿角度的匹配关系。
This article focuses on the process of shaping the mixed rifle with a large spiral angle in the cannon, and proposes a cone-like cathode structure with asymmetric cuneiform working tooth.
试验结果表明：1破坏首先发育在巷道两帮中线，局部破坏产生后，逐渐形成一对“楔形”破坏区域。
The results show that: 1 the destruction develops first from the center line of both sidewalls of roadway, after the local failure, there gradually formed a pair of "wedge" failure zone.
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