Purpose: To evaluate the potential clinical usability of a new prototype of ophthalmic blue light filters developed by u......

基于东欢坨矿2JK-3／20型双滚筒单绳缠绕式提升机，提出了提升机电控系统改造方案，由可编程控制器代替继电器-接触器构成的逻辑控制装置......