“ruling pen”的概念、定义、翻译、参考文献-科学参考

单词	ruling pen
释义	ruling pen [`rül·iŋ ´pen] ^{GRAPHIC ARTS} A drafter's pen that has two adjustable pointed blades between which ink is contained.
随便看	tonnage tonnage deck tonne tonneau tonofibril tonometer tonoplast tonsil tonsillectomy tonsillitis tonstein tonus tool tool bit toolbox tool-center point tool-check system tool design tool-dresser tool extractor tool-function controller toolhead tooling underplate underpunch

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。