Features: certain width coil paper automatic insertion to armature open slot, automatic graduation, automatic cutting off, PLC and touching screen operation.

特点：采用卷纸定宽度对电枢开口槽进行自动打入，自动分度，自动切断，PLC程控，触摸屏操作。

youdao

Melnyk and I find an open slot among the crowd of surfcasters on the beach and duckwalk backwards into the rough sea.

FORBES: Magazine Article

The card had an open slot, and promoter Kathy Duva offered the fight to Jennings, who took it even though he would have less than a week to train.

WSJ: This Top Heavyweight Has a Day Job

And though it doesn't quite make up for the middling resolution, there's at least an open memory slot, allowing folks to go beyond the standard four gigs.

ENGADGET: HP announces the EliteBook Revolve, a Windows 8 convertible for the business crowd (video)