principal station
2.PRINCIPAL INFLUENTIAL FACTORS ON STATION LOCATION SELECTION OF MAIN MARSHALLING STATION IN DALIAN RAILWAY TERMINAL
4.A similar objective is achieved in a Beijing secondary school by having the students run a TV station of their own.All work involved, from programme planning to backstage chores, is done by the students themselves. Even the student director of the TV station was elected on a one-man-one-vote basis by the whole school including the principal, teachers, and students.
5.The features and its reasons of annual variation of the earth resistivity(ρ_s)in Yangyuan station are ana-lyzed, and various possible reasons of the annual amplitude accrete of ρ_s after 1989 are discussed,suggestedthat the seismicity enhancement before and after Datong earthquake of M=6.1 is the principal reason of theannual amplitude accrete of ρ_s.

