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| 51. | sand mo(u)ld pig iro |
| 砂型生铁 |
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| 52. | Pig iron contains, much more carbon than steel. |
| 生铁比钢的含碳量要高得多。生铁的含碳量一般是3～4％，而钢的含碳只有0．025～1.7％。 |
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| 53. | acid Bessemer pig |
| 酸性转炉生铁 |
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| 54. | Gentlemen, shoveling is a great science compared with pig-iron handling. |
| 先生们，同搬运生铁相比，铲工是一门重大学问。 |
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| 55. | machine cast pig |
| 机铸生铁 |
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| 56. | pig and ore process |
| 生铁矿石法 |
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| 57. | Cannon Foundry: Cannons are made here from pig iron and wood. |
| 大炮制造厂：在这里把生铁和木头制成大炮。 |
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| 58. | 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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| 59. | high silicon pig iro |
| 高硅生铁 |
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| 60. | cast iron mower |
| 生铁割草机 |
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