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| 41. | permissible wear |
| 允许磨损 |
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| 42. | over wear=overwear |
| 过度磨损 |
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| 43. | abrasion and wear |
| 磨耗;磨损 |
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| 44. | catastrophic wear |
| 灾变磨损 |
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| 45. | abrasive action |
| 磨损作用 |
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| 46. | deface an inscription |
| 磨损碑文 |
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| 47. | abrasive nature |
| 磨损性质 |
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| 48. | stand wear and tear forever |
| 永不磨损 |
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| 49. | wear of polymers |
| 高聚物磨损 |
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| 50. | inter deterioration |
| 内部磨损 |
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