安全火花  safe spark

安全火花电路  spark circuits of safety

安全火花设备  intrinsically safe apparatus

安全火花型仪器  spark-proof instrument

安全间隙  safety frame; safe clearance; safety clearance; security clearance; safety margin; safe gap; safety gap

临界安全间隙  critical safety gap

最大试验安全间隙  maximum experimental safe gap

最小安全间隙距离  minimum safety distance

电火花间隙激发器  spark gap exciter

多间隙火花开关  multi-channel gas switch

辅助火花间隙  auxiliary spark-gap

固定间隙火花放电调制器  fixed spark-gap modulator

火花间隙  arcing distance; spark gap; sparking distance; light gap

火花间隙传导  spark-gap transmission

火花间隙激发器  spark-gap exciter

火花间隙接通  gap bridging

火花塞火花间隙  plug gap

沿面间隙火花塞  surface gap spark plug

安安安培  ampere