氢氮氧含量是铁水一次质量的判断因素之一。
Content of hydrogen, oxygen and nitrogen is a judging factor to the quality of molten iron.
拥有西方企业的经营理念和管理手段，拥有非常严格的质量控制和二次质量控制能力。
It has Western companies's operation principle and ladder of management, also has very strict quality control and second quality control ability.
为促成一次核爆炸，临界质量必须在一百万分之一秒内聚集在一起。
In order to make a nuclear explosion, the critical mass must come together within a fraction of a millionth of a second.
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