“development of mechanical industry in the United States”的概念、定义、翻译、参考文献-科学参考

单词	development of mechanical industry in the United States
释义	development of mechanical industry in the United States Encyclopedia 工学﹝外国机械工业﹞释 development of mechanical industry in the United States美国机械工业发展 18世纪末期，美国摆脱了英国的殖民统治，走向独立，这是美国机械工业的起点。
随便看	proportional plus integral plus derivative control proportional plus integral plus differential control proportional-plus-integral-plus-differential control proportional price rule proportional profile proportional region proportional regulator proportional regulatory systems proportional relation proportional relations among agriculture,light industry and heavy industry proportional relations among primary industry,secondary industry and tertiary industry proportional representation proportional sampling proportional selection proportional sequence proportional stratified sampling proportional subclass number proportional trapping proportional valve proportional variable proportion by addition proportion by addition and subtraction proportion by alternation proportion by subtraction proportioner

科学参考收录了854744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。