- dull die
- 磨损: wear and tear; abrasive wear ...
- 的: 4次方是 The fourth power of 2 i ...
- 模具: mould; matrix; pattern die; ...
- 磨损的: abradant; abrasive; attrited; distressed; lost; outworn; tatty - smart; tearing; wearing; worn out; worn-down; worn-out
- 被水磨损的: water-worn
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