“helper grade”的概念、定义、翻译、参考文献-科学参考

单词	helper grade
释义	helper grade [`hel·pǝr ´grād] ^{MINING ENGINEERING} A grade on which helper engines are required to assist road locomotives. Also known as pusher grade.
随便看	jet streak jet stream jetting jetting tool jettison jet tones jetty Jevons effect jewel jeweler's rouge jewelry alloy jezekite J factor JFET J function jib jib boom jib crane jib end jig jig back jig borer jigger jigger boss jiggering

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。