?测速计时仪
... 同位素计时仪 isotopic chronometer 测速计时仪 velocity measuring chronograph 夜间计时仪 nocturnaltimer ...
测速计时仪
Always fascinated by gadgetry, he produced his first important invention there: a chronograph for measuring the velocity of artillery shells.
FORBES: The Alchemist
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。