The experimental research of the interaction between a free surface and the internal wave generated by a towed sphere in a stratified fluid is conducted in the water tank.

在静水槽中进行了分层流体中运动物体生成的内重力波与自由面相互作用的实验研究。

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And its veracity is compared among the regulation correction and the center of gravity shifting correction by calculating the free surface influence of different shape of tank.

通过与规范的近似计算法的比较，阐述了不同方法对不同液舱形状进行自由液面修正时的准确程度。

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All kinds of Pb-free surface treatment steel sheet for automotive fuel tank with better corrosion resistance were developed by many steel company in the developed country.

发达国家的许多钢铁厂开发了各种无铅且耐蚀性更好的汽车燃油箱用表面处理钢板材料，包括无铅镀层钢板和预涂层钢板两大类。

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