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| 51. | Lead Underwriter |
| 牵头包销商；主承销商* |
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| 52. | primordial lead |
| 原始铅 |
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| 53. | pyrophoric lead |
| 发火铅 |
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| 54. | commercial lead |
| 商品铅 |
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| 55. | horizontal lead |
| 水平方向前置量 |
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| 56. | oesophageal lead |
| 食道导联 |
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| 57. | radiogenic lead |
| 放射成因铅 |
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| 58. | argentiferous lead |
| 含银铅 |
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| 59. | counterweight ,lead |
| 铅砝码 |
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| 60. | lead hydroxide |
| 氢氧化铅 |
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