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51. | multi-purpose scriber |
| 多功能划线器 |
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52. | dry streak plate |
| 灰斑镀锡薄钢板 |
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53. | electronic streak cameras |
| 电子条纹相机 |
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54. | pipe marking on slab |
| 管子平台划线 |
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55. | large pitch streak |
| 大脂斑纹 |
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56. | underlining vbl. |
| 下面划线 |
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57. | thin porous streak |
| 孔隙性薄层 |
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58. | Channel Planning Line |
| 航道规划线 |
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59. | To cross a cheque. |
| 支票上划线。 |
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60. | road line marker |
| 道路划线机 |
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