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| 51. | barrel amalgamation |
| 桶式混汞法 |
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| 52. | grinding barrel |
| 滚桶研磨 |
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| 53. | focusing barrel |
| 聚焦镜筒 |
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| 54. | barrel enamelling |
| 滚筒涂装 |
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| 55. | barrel elevator |
| 圆筒升降机 |
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| 56. | stationary barrel |
| 固定条盒 |
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| 57. | barrel resoldered |
| 桶重焊 |
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| 58. | barrel cleaning |
| 滚筒清理 |
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| 59. | hoisting barrel |
| 绞车滚筒 |
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| 60. | Barrel lubricant |
| 外套润滑剂 |
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