According to the theoretical analysis, the testing method of approximate sound field characteristic in steel was proposed, and it was applied to the designing of special probe.
根据理论分析，提出了工件中声场特性测试的近似方法，绘制了特定探头钢中声场状态。
According to the description and brief analysis, a characteristic expressing mode of a special era is brought forward.
通过对这些特点的描绘和分析，展现一个特殊时代颇有特色的表述方式。
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