A.Ⅰ+Ⅱ+Ⅳ B.Ⅲ+Ⅴ C.Ⅰ+Ⅱ+Ⅲ D.Ⅳ+Ⅴ
A.ZL101 B.ZL105 C.ZL108 D.ZL111
A.是软基体组织上分布着硬质点 B.摩擦系数小、良好的导热性和抗蚀性 C.疲劳强度较高,适于作中、高速柴油机的主轴承 D.有偏析现象
A.ZL102 B.ZL108 C.ZL110 D.ZL108和ZL110
A.30% B.50% C.70% D.90%