单项选择题
A.机油加热或火焰加热后用拆卸工具拆卸 B.榔头直接敲击 C.榔头加垫铜棒或铝板敲击 D.压力机等挤压
A.0.10～0.25 B.0.25～0.4 C.0.25～0.5 D.0.5～0.75
A.0.10%～0.15% B.0.15%～0.20% C.0.05%～0.10% D.越小越好
A.45° B.30° C.60° D.90°
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