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51. | acoustic defect |
| 音质缺陷 |
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52. | crystalline imperfection |
| 晶体点阵缺陷;晶体晶格缺陷;晶体缺陷 |
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53. | a corporal defect; |
| 身体缺陷; |
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54. | engineering deficiency |
| 工程技术缺陷 |
|
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55. | An optical defect. |
| 视觉缺陷 |
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56. | defective workmanship |
| 工艺缺陷 |
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57. | water mark defect |
| 水纹缺陷 |
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58. | hardware deficiency |
| 硬件缺陷 |
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59. | Artificial defect |
| 人工缺陷 |
|
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60. | interstitial defect |
| 间隙缺陷 |
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