To reduce interior noise of a passenger compartment measures are taken in the propagation route and the accepter.
对于铁路客车车内降噪，主要从噪声源和传声途径两个方面采取措施。
It suggests that the meridional circulation has a marked influence on the route of stationary waves propagation in Winter and Summer Hemisphere.
这表明经圈环流对冬、夏半球的定常波传播路径有着显著的影响。
The essay introduces purpose and method of propagation performance test of mircowave route.
介绍了微波信号传播性能测试的目的、方法。
Result show that the trace boron additive causes the changes in the mode of fatigue crack propagation and its route, so that crack growth rate of 40MnB is lowered.
结果表明，微量合金元素硼改变了裂纹扩展途径和扩展方式，从而降低了疲劳裂纹扩展速率。
Result show that the trace boron additive causes the changes in the mode of fatigue crack propagation and its route, so that crack growth rate of 40MnB is lowered.
结果表明，微量合金元素硼改变了裂纹扩展途径和扩展方式，从而降低了疲劳裂纹扩展速率。
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