Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Ohgawara Takashi,Electric Variable Pitch Propeller Mechanism Using Synchronous Differential Transmission,Marine Engineering,13461427,The Japan Institute of Marine Engineering,2018,53,2,246-251,https://cir.nii.ac.jp/crid/1390282679548306432,https://doi.org/10.5988/jime.53.246