“占线信号”的概念、定义、翻译、参考文献-科学参考

单词	占线信号
释义	占线信号 engaged signal engaged tone tone signal busy signal busy back signal busy tone signal
随便看	rigging ahead rigging and left coupling rigging-and-left-hand core rigging-and-left-hand-screw clip rigging and left nut rigging angle rigging angle bend rigging angle clamp rigging-angle cone rigging-angle connector rigging-angle crossing rigging-angle drive rigging-angle elbow pipe rigging-angle fire rigging-angle friction wheel rigging-angle gear rigging angle of incidence rigging band rigging bell crank rigging datum line rigging diagram rigging error rigging line rigging machine rigging pin

科学参考收录了1248194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。