characteristics of natural vibration
frequency of natural vibration
Natural vibration
固有振动
固有振荡
自振频率
自由振动
自振特性
振动特性
自然振动
自振
natural vibration amplitude
natural vibration behavior
Natural vibration character
Natural Vibration Characteristic
Natural vibration characteristics
natural vibration frequencies
natural vibration frequency
自振频率
固有振动频率
固有频率
自振周期
自振特性
动力特性
Natural Vibration Period
natural vibration property
performance of natural vibration
Vibration natural frequency
natural draught natural draft
low voltage and high voltage injury
touch voltage and step voltage