机械设计带轮辅助计算

ElseIf aa1 > 170 Then kaa = 0.98 ElseIf aa1 > 165 Then kaa = 0.96 ElseIf aa1 > 160 Then kaa = 0.95 ElseIf aa1 > 155 Then kaa = 0.93 ElseIf aa1 > 150 Then kaa = 0.92 ElseIf aa1 > 145 Then kaa = 0.91 ElseIf aa1 > 140 Then kaa = 0.89 ElseIf aa1 > 135 Then ka