01003nam a2200241 c 4500001001500000005001500015008004100030040001900071041001300090049003000103052002300133056001500156082001600171100004800187245015400235260003600389300003000425502009600455653012400551950002100675963003700696965002800733KDM198907606  19941012111420890918s1989    ulka       AK 000   kor    a011001c0110010 akorbeng0 lEM683379lEM685046c2fDP01a521.557b유496ㅌ  a521.557230 a631.3722191 a유수남,g劉壽男,d1956-0KAC20141263010a트랙터의 電子油壓式 히치制御 시스템에 關한 硏究=xElectronic-hydraulic hitch control system for agricultural tractor/d劉壽男  a서울:b서울大學校,c1989  axiv,162p.:b삽도;c26cm1 a학위논문(박사) --b서울大學校 大學院:c農工學科 農業機械專攻,d1989  a트랙터a전자유압식a히치제어a시스템aELECTRONICHYDRAULICaHITCHaCONTROLaSYSTEMaAGRICULTURALaTRACTOR1 a비매품b\5400  a농공학과a농업기계전공  a농업기계x트랙터