{"data":{"fields":"term_definition","term_definition":"<div class=\"definition\">The surface of action in parallel-axis involute gears. It is tangent to the base cylinders.<\/div><div class=\"align align-image align-left\" itemscope itemtype=\"http:\/\/schema.org\/ImageObject\"><img src=\"https:\/\/www.gleason.com\/images\/muiUm3.7301\/544w\/cylindardwg.jpg\" alt=\"cylindardwg\"><\/div>"}}