01162nam a2200253 c 4500001001300000005001500013008004100028040001100069041001300080052003500093245011700128300002100245545007100266545006500337545006800402653013900470700005300609700004800662700001400710773012600724900002200850900001700872900001900889KSI00045178820050901093149050804s1999    ggk           000   kor    a0110010 akorbeng01a326.3405b한624ㅎc2(1)-2(4)00a도상자갈의 마모／파쇄 특성=xBreakage characteristics of ballast/d정근영,e김현기,e이종득  ap. 61-69;c26 cm  a정근영, 정회원, 한국철도기술연구원, 선임연구원  a김현기, 정회원, 한국철도기술연구원, 연구원  a이종득, 정회원, 한국철도대학 시설토목과 교수  aDurability of ballastaTrack BehaviouraBreakage characteristics of ballastaBallast box testaMTT field testaBallast life prediction1 a정근영,g鄭根永,d1967-0KAC2018370564aut1 a김현기,g金鉉奇,d1970-0KAC2014044771 a이종득0 t한국철도학회지.d한국철도학회.gVol.2 No.3(1999년 9월), p. 61-69q2:3<61w(011001)KSE199901986,x1229-110210aChung, Keun-Young10aKim, Hyun-Ki10aLee, Jong-Deuk