first tap meaning in English

初加工丝锥
粗加工丝锥
头攻丝锥
锥形手用丝锥

A new technology of oxygen - enriched blasting for the first tap of blast furnace has been developed . the blast furnace can be tapped smoothly and operated normally after blast . the accident of tap failure , followed by tuyere burning due to slag going up can be avoided
利用富氧燃烧技术研究一种高炉首次出铁时吹烧铁口新工艺，使休风后的高炉出铁顺利，尽快达到高炉顺行，避免铁水出不来，炉内渣面上涨，风口烧穿等事故的发生。
Abstract : a new technology of oxygen - enriched blasting for the first tap of blast furnace has been developed . the blast furnace can be tapped smoothly and operated normally after blast . the accident of tap failure , followed by tuyere burning due to slag going up can be avoided
文摘:利用富氧燃烧技术研究一种高炉首次出铁时吹烧铁口新工艺，使休风后的高炉出铁顺利，尽快达到高炉顺行，避免铁水出不来，炉内渣面上涨，风口烧穿等事故的发生。