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reduced burden
expl. 比例抵抗线比例抵抗线定义为:Bᵣ=BₚSₚ。式中,Bₚ为实际抵抗线,m;Sₚ 为实际孔间距,m
met. 还原炉料
reduced burden: 4 phrases in 1 subject
Metallurgy4