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Experimental investigations show that the semiempirical concavity calculation formulation given here are practical.
The roll grinder is an indispensable important equipment in the industry, which grinds all kinds of dished or convex roller.

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Open the tool →凹度 (āo dù) means “concavity”.
凹度 is pronounced āo dù in Mandarin Chinese.
“concavity” is 凹度 (āo dù) in Chinese.
This page has 2 example sentences using 凹度, each with pinyin and an English translation.