About KOYAMA JUN
About 日立国際電気
About ITO NAOTOSHI
About 日立国際電気
About YOSHIKAWA TAKAHIRO
About 日立国際電気
About ISHIYAMA ATSUSHI
About 日立国際電気
About MITSUI YASUFUMI
About 日立国際電気
About 日立国際電気技報
About repeater
About monolithic structure
About miniaturization
About weight reduction
About mobility(performance)
About improvement
About mobile communication
About athletic sports
About marathon
About monolithic structure
About mobile radio communication
About long distance relay
About performance improvement
About field pickup unit
About I/O interfaces
About Broadcasting in general
About 体型
About FPU
About 送信装置