Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SUGAWARA Tomokichi,Illustration of Standardized Coal Unloader : Level Luffing Crane Type,Journal of the Society of Mechanical Engineers,00214728,The Japan Society of Mechanical Engineers,1963,66,539,1737-1740,https://cir.nii.ac.jp/crid/1390001205916767488,https://doi.org/10.1299/jsmemag.66.539_1737