nullon.零(遥控飞机)
nulladj.无效的;无价值的;无效力的n.零;空vt.使无效
null-balance infrared spectrometer零位平衡红外光谱仪
null indicating double-beam system零示双光束系统
null-type infrared spectrophotometer零位红外分光光度计
null-profit educational organization非营利教育机构
null-current potentiometric titration零电流电位滴定
Null-space compensation of adjusting mechanism执行机构的空程补偿
Null Phase-Shift Instantaneous Polarization Filter零相移瞬时极化滤波器