1. Chrome plating lori dada lati mu yiya resistance;
2. Awọn iho alaimuṣinṣin ti wa ni fifẹ pẹlu chromium lati mu ibi ipamọ epo dada sii ati ki o mu iyara ṣiṣẹ-in;
3. Ti a fiwe si ori inu lati mu elasticity dara;
4. Ibi ipamọ epo ti a pese ni ita ti oruka lati dẹrọ lubrication;
5. Awọn lode dada ti awọn iwọn ti wa ni palara pẹlu Ejò lati dẹrọ yen-ni;
6. Molybdenum ti wa ni sokiri lori ita ita ti iwọn lati dinku ifaramọ ati wọ.

Akopọ bi wọnyi:
Ṣe ilọsiwaju resistance resistance: chrome plating, nitriding
Ṣe ilọsiwaju iṣẹ ṣiṣe-ni ibẹrẹ: fifin bàbà, phosphating, sulfurizing
Lati yago fun yiya alemora: sokiri molybdenum