4.1梯形图(LAD) 0.1 10.2 Q0.0 I0.1 I0.2 Q0.0 I00 I0.0 a 图4-5左重右轻原则 4.1梯形图(LAD) 图4-5 左重右轻原则 I0.0 I0.1 I0.2 Q0.0 (a) I0.0 I0.1 I0.2 Q0.0 (b)