deep hardening造句

"deep hardening"是什么意思

造句与例句手机版

The lack of deep hardening in these alloys negates their use .
这些合金缺乏深层硬化能力使它们无法利用。
Deep hardening steel
深硬化钢
It's difficult to see deep hardening in a sentence. 用deep hardening造句挺难的

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