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| 配方类型： |
METALS AND THEIR TREATMENT |
| 配方说明： |
Foundry Sand Additive (U.S. Patent 2,848,338) |
| 配方组成： |
Powdered Charcoal (80-200 Mesh)/70-75
Fuel Oil (Fl. Pt. 120-180'F.)/25-30 |
| 配制方法： |
0.5-1.5% of above is added to coat particles of foundry core sand. |
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