含碳的铌合金,若在高温下受氧沾污,易产生脱碳现象.In niobium alloy containing carbon occurs decarburization in case of contamination by oxygen at higher temperature.含%碳的钢(铁碳混合物的低共熔点),含%碳的碳钢是纯珠光体.A mixture of ferrite cementite forming distinct la...
我们都曾祈求能找到更加体贴的男人。We have all wished for men who are more considerate.这真是十分友好体贴的举动。It was a very kind and thoughtful gesture.体贴的男人a sensitive and caring man...