You're not just going to have that, So, first of all, you had sound. You had a bell, so if anything went wrong —  — or the machine needed the attendant to come to it, there was a bell it could ring.  And there's actually an instruction on the punch card which says "Ring the bell." So you can imagine this "Ting!"
没有的那些配件 首先呢，要有声音。你可以用个铃铛 如果有事情出错了的话---- 或者机器需要一个人工干预的时候 就可以摇铃铛. 在打孔卡片上实际有个说明 上面写着:"摇铃铛."然后你就可以想象"叮!"的一声