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| 81. | centrifugal rendering |
| 离心法提炼油脂 |
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| 82. | Pig iron used for spherical graphite cast iron |
| GB/T1412-1985球墨铸铁用生铁 |
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| 83. | Then, what is pig iron ? |
| 那么，什么是生铁呢? |
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| 84. | extraction agent |
| 提炼剂;萃取剂 |
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| 85. | Foundry pig iron |
| GB/T718-1982铸造用生铁 |
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| 86. | oil distilling and refining |
| 汽油蒸馏及提炼 |
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| 87. | Pig iron for steel making |
| GB/T717-1998炼钢用生铁 |
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| 88. | steam-refined cylinder oil |
| 蒸汽提炼汽缸油 |
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| 89. | vertical retort process |
| 竖罐提炼法 |
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| 90. | refine sugar, oil, ore, etc |
| 制糖、 炼油、 提炼矿石 |
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