Step four: the main frequency spectrum of the acoustic analysis.
步骤四：进行该声波主要频谱的分析。
The main effect is to raise the fundamental slosh mode frequency.
主要作用是提高基本的晃动频率。
Our product main material for high frequency steel pipe and PP import plastic product.
我们产品次要的资料为高频钢管和PP入口塑料产品。
Our product main material for high frequency steel pipe and PP import plastic product.
我们产品次要的资料为高频钢管和PP入口塑料产品。
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