Analyzed from the Angle of civil law, this kind of provision should be effective.

从民法的角度分析，这种条款应该是有效的。

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An effective arm position can be achieved by a downward entry Angle.

有效的入水方式能靠向下的入水角度来获得。

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An effective arm position can be achieved by a downward entry Angle.

有效的入水方式能靠向下的入水角度来获得。

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