鑽頭(原始内容存档于2020-05-10). Todd, Robert H.; Allen, Dell K.; Alting, Leo, Manufacturing Processes Reference Guide, Industrial Press Inc.: 43–48, 1994 [2017-03-21]
孔 (机械加工)ISBN 978-3-589-24130-9 Todd, Robert H.; Allen, Dell K.; Alting, Leo, Manufacturing Processes Reference Guide, Industrial Press Inc.: 43–48, 1994 [2021-02-18]