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| 尤卡公司氧-氩侧吹转炉炼钢法; 联合碳化物公司氧-氩侧吹转炉炼钢法; 联合碳化物公司氧-氩侧吹转炉炼钢法 | |||
| 联合碳化物公司注射发泡法 | |||
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Union Carbide process : 2 phrases in 1 subject |
| Plastics | 2 |
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