The article presents a method with the roughness of the lowest cut face as the main criterion for quality evaluation and detection.
提出了利用切割面下缘粗糙度作为评价切割面质量的方法。
Helical Roots pump has great improvements on the face of stabilizing pressure pulse quality of passing cut sensitivity medium, reducing noises and vibration, avoiding vapor fret etc.
螺旋式罗茨泵在稳定过流剪切敏感介质压力脉动质量，减少噪音、振动，避免气蚀等方面有较大改善。
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