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Through the adjustment of coating formula and thickness, the service life and the casting quality of permanent mould could be enhanced.
通过调整涂料的配方与厚度，提高金属型的使用寿命和铸件的品质。
The industrial practice indicates that the quality of auto dies can be greatly enhanced and the service life of the auto dies can be prolonged remarkably through optimal plasma nitriding.
生产实践表明，合理离子渗氮可以大大提高汽车模具的质量和延长其使用寿命。
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