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| 气孔; 表面气孔; 钢锭表皮气泡; 表面气孔 钢锭表面缺陷 (【技】钢锭表面上的开口孔眼。主要形成原因有：钢中气体经由钢锭表面析出；钢锭模内壁或所使用的保护渣潮湿，浇注遇热形成蒸汽作用于钢锭表面。主要防止措施是减少钢中气体含量，保持锭模和保护渣干燥。) | |||
| 表皮气泡 | |||
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skin hole : 4 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 3 |
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