The seal is either stamped smooth or in a corrugated pattern and may feature a serial number or code.
密封采用光滑压纹或者采用波纹压纹，并且可以压印序列号或者代码。
This paper studies the performance of internal pressure blasting and external pressure squirm between smooth tube and corrugated tubes from the ANSYS finite element analysis and testing.
本文从ANSYS有限元分析和试验两方面分别对光管和波节管在承受内压爆破和承受外压失稳时的性能进行研究。
Corrugated wall horns and smooth wall multimode horns are two comparatively ideal feeds with high efficiency.
波纹喇叭与光壁多模喇叭是两种比较理想的高效率馈源。
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