简介：RecentresearchprogressesinMulti-BeamKlystron(MBK)inIECASarebrieflyintroducedintheletter.TheS-bandMBKsofIECAShavepeakpowerof120-250kW,averagepowerof4-9kW,efficiencyof35-45%,gainof41-46dB,beamvoltageof15-19kV,andweightof40-45kg.SomekeytechnicalproblemsofMBKarealsodescribedanddiscussed.Amongthem,improvingthedesignofMBKtoobtaintherequiredbandwidth,raisingbeamtransmissiontoincreaseaveragepower,eliminatingoscillationandsprayspectrum,overcomingwindowbreakdowncausedbymagicmode,reducingbreakdowntimesofelectrongun,aremostimportantthingsforthepracticalMBK.Besides,furtherresearchworkinMBKinIECASiscommented.

简介：PresidentZhaoJibinofChinaTitonggoestoJiangsutodosomesurveysandafterlisteningtotheworkingreportofJiangsuTietong,heinspectsthenetworkdevelopmentinNanjing,Suzhou,Changzhouandothercities.ZhaoJiBinemphasizesChinaTietongshouldbeonthewayof'enlargeprivatenetworkcoverageandmakegreatprogressinnetworkregionalization',makeeveryefforttolayasolid