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61. | "One way to do this is by using an open-hearth furnace, where pig iron and scrap steel is heated. " |
| 炼钢的一种方法是将生铁和废钢放在平炉内加热。 |
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62. | Pig iron is converted into steel by removing most but not all the impurities. |
| 生铁变成钢要除掉大部分而不是全部的杂质。 |
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63. | Pig iron: Crude iron obtained directly from the Blast furnace and cast in molds. |
| 生铁:从高炉直接炼得并在模中铸出的粗铁。 |
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64. | cast iron mower |
| 生铁割草机 |
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65. | A furnace in which pig iron is converted into steel by the Bessemer process. |
| 炼钢熔炉一种通过酸性转炉法将生铁练成钢的设备 |
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66. | One way to do this is by using an open hearth furnace, where pig iron and scrap steel are heated . |
| 炼钢的一种方法是将生铁和废钢放在平炉内加热。 |
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67. | native iron; |
| 生铁; |
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68. | blase furnace cast iron |
| 高炉生铁 |
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69. | But after a short time, |
| 就开始teach the pig how to play the violin. |
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70. | cast iron stove range |
| 生铁灶 |
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