counting g tube计数管
hour-counting wheel tube时计数轮套
polyanode counting tube多阳极计数管
halogen counting tube[核] 卤素计数管
neutron counting tube中子计数管
multielectrode counting tube[电子] 多电极计数管
decimal counting tube[电子] 十进制计数管
decade e counting tube十进制计数管;十进管
decade counting tube[电子] 十进制计数管;十进管;十进计数管