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空轧孔型
met.	blind pass; dead pass; dummy pass; false pass; shallow pass
tech.	idle pass
【压】 空轧孔型
met.	dead hole; false pass
空轧〔非工作〕孔型
met.	dead pass
空轧〔立轧送料〕孔型
met.	shallow pass
空轧孔型道次
met.	idle pass
空轧孔型〔道次〕
roll.	dummy pass