전종익 홍예선 2024-01-21T16:03:56Z 2024-01-21T16:03:56Z 2022-01-10 1999-01 1226-4873 https://pubs.kist.re.kr/handle/201004/142473 A study on improvement of the two-axes' simultaneous operation characteristics of a knuckle-type hydraulic vehicle crane 너클형 유압크레인의 2축 동시조작 특성 개선에 관한 연구 Article 2 대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A), v.23, no.4, pp.620 - 629 대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A) 23 4 620 629 hydraulic vehicle crane directional control valve design of spool notches simulataneous operation synchronized motion of two axes