multinitriding
... 多次淬火 repeated hardening; 多次氮化（处理） multinitriding; 多次定位 multiple bearing; ...
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氮化硼涂料填补了国内同类产品的空白，以其卓越的性能和适中的价格，多次与进口同类产品较量，赢得了用户。
Boron nitride coating has filled the domestic blank of similar products. With brilliant performance and moderate price, it competed with the imported like products many times and won users.
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