This article is proposed to develop a new type of digit programme-controlled telephone switching board which is based upon the CAN bus to replace the old automatic telephone switchboard.

本文提出研制新型的基于CAN总线的数字程控交换机替换原有的全电子式自动电话交换机。

youdao

You can't criticise a book without opening the cover any more than you can criticise a TV programme without switching on the box.

BBC: NEWS | UK | Magazine | Baby, I'm desperate