negative map底片图negativeadj.否定的；消极的；负面的；负的n.否定；反面意见；底片；[数]负数vt.否定negative friction-resistance stress负摩阻力negative sequence feedforward control负序前馈控制negative-permeable torque converter负可透变扭器negative staining electron microscope电镜负染negative-pressure absorption of gas煤气负压吸收negative feedback of current parallel电流并联负反馈negative pi-meson radiation therapy负π介子放射治疗, 阴性π介子放射治疗negative sequence overload protection负序过负荷保护negative feedback of voltage parallel电压并联负反馈negative-resistance tube oscillator负阻管振荡器