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[单选题]
保护气体用于维持炉内的还原气氛,其成分为()。
A.95-70%N2+5-30%H2
B.90-70%N2+10-30%H2
C.95-65%N2+5-35%H2
D.95-65%N2+5-35%H2
查看答案
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A.95-70%N2+5-30%H2
B.90-70%N2+10-30%H2
C.95-65%N2+5-35%H2
D.95-65%N2+5-35%H2
A.氧化气氛下烧成,应配制在生料釉内
B.氧化气氛下烧成,应配在熔块内
C.氧化气氛下烧成,应配在生料内
D.还原气氛下烧成,常配在熔块内