矩形V型曲面网板的水平扩张力可增大43。
The horizontal spread of the rectangular V-type curved otter board increased by 43.
给出第二型曲面积分计算的几种方法，并举例说明了这几种方法的应用。
In this paper, we give a few methods for calculating second-kind surface integral and their applications.
通过3个航次矩形V型曲面网板与V型网板作业性能和生产效果的对比试验。
Rectangular V-type curved otter board and V-type curved otter board were tested to compare the operation characteristics and production effect during the three trips.
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