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1·Haitan Strait is a south-north and long restricted channel strait, tidal wave in the strait belongs to progressive wave.

海坛海峡为南北狭长型海峡，海峡内潮波属于前进波。

2·The problem of lightning progressive wave protection for electrified railway traction substation of our country has been studied in this paper.

本文对我国电气化铁道牵引变电所的雷电进行波保护问题进行了研究。

3·Nonlinear sound wave propagation is solved rigorously for progressive and standing waves and applied to composite tubes including thermoacoustic stacks with temperature gradient.

本文中给了非线性行波和驻波的严格解，并用于包括热声堆和温度梯度的复合管中。