00980nam a2200241 k 4500001001500000005001500015008004100030040001900071041001300090049003000103052002300133056001500156082001600171100004800187245015500235260003600390300004100426502009600467653009200563950002100655963003700676965002500713KDM199211716  20200825173542921212s1992    ulkaf      AK 000   kor    a011001c0110010 akorbeng0 lEM942930lEM944681c2fDP01a521.551b박621ㅈ  a521.551230 a631.3122191 a박준걸,g朴濬傑,d1952-0KAC20170883210a쟁기의 耕耘抵抗力 測定 및 豫測에 關한 硏究=xMeasurement and prediction of the tillage forces of the Korean plow(Janggi)/d朴濬傑  a서울:b서울大學校,c1992  aviii,121,45p.:b삽도,도판;c26cm1 a학위논문(박사) --b서울大學校 大學院:c農工學科 農業機械專攻,d1992  a쟁기a경운저항력aMEASUREMENTaPREDICTIONaTILLAGEaFORCESaKOREANaPLOWaJANGGI1 a비매품b\7600  a농공학과a농업기계전공  a농업기계x쟁기