主要介绍了微机控制标志板打号机的工作原理及结构特点。
Mainly described are the working principles and structure features of the number marking device for the computer-controlled signal board.
主要介绍了微机控制标志板打号机的工作原理及结构特点。
The structure, work principle and design way of spring safety link were introduced in this paper.
不仅是书籍，杂志和报纸传递着书写的信息，路旁的标志，公告板，店铺标志甚至是街头涂鸦也同样传递着这种信息。
Not only do books, magazines and newspapers convey written information, but so do street signs, billboards, shop signs and even graffiti.
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