复曲线轨距加宽应在正矢递减范围内,从较大轨距加宽向较小轨距加宽均匀递减。
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钢包冶金的主要功能:钢水加热;吹氩()温度、成分;微调化学成分;去除钢中夹杂物;深脱硫处理。
A. 均匀
B. 降低
C. 提高
D. 改善
Each fire drill shall not include().
A. Starting of a fire pump
B. Reporting to stations
C. Preparing for the duties described in the muster list
D. Checking of cargo handling equipment