The scientific community does not shore up the theories however many supporters did roll out their hypothesis over the hollow earth.
科学界不托理论然而，许多支持者也推出了自己的空心地球的假说。
The plastic limit analysis and parametric design of a hollow cast steel roll with axle sleeve of the high-speed paper machine are studied.
研究了高速纸机中具有闷头的空心铸钢辊结构的塑性极限和参数设计问题。
The plastic limit analysis and parametric design of a hollow cast steel roll with axle sleeve of the high-speed paper machine are studied.
研究了高速纸机中具有闷头的空心铸钢辊结构的塑性极限和参数设计问题。
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