1. The overall design should be based on strength.
2. The design of the bucket lug assembly should be based on the stiffness.
3. When working, the cutting resistance should be smaller.
4. The friction area will become smaller when working.
5. The volume of the bucket should be larger, and the volume of the appearance should be smaller.
6. The hardness and wear resistance should be improved, and the toughness and impact resistance should be high.
