“opening in head”的概念、定义、翻译、参考文献-科学参考

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。

单词	opening in head
释义	opening in head 封头开孔
随便看	subscriber line subscriber line circuit subscriber line equipment subscriber loop subscriber meter subscriber multiple subscriber plant transmission index subscribers subscriber's apparatus subscriber's drop subscriber selector sub scriber set subscriber's exchange subscriber's extension subscriber's extension station subscribers group service subscriber's inter-communication installation subscriber's jack subscriber's line subscriber's loop subscriber's machine subscriber's main station subscriber's multiple jack subscriber's number display circuit subscriber's protector