https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13963869Edit ImageSaveSaveEditCropCustom TextTechnology: section and elevation of the Bramah and Marshall locks. Coloured engraving by J. Pass, 1813.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 933 x 1200 px | 300 dpiLarge JPEG 2480 x 3189 px | 300 dpiFree DownloadTechnology: section and elevation of the Bramah and Marshall locks. Coloured engraving by J. Pass, 1813.More