The rational design of the position of needle holes on the guide board in matrix-type printerhead is studied.
计算机主要外部设备矩阵打印机头中导针板的针孔合理设计是能打印出复杂的图形和汉字的关键部件。
2
The newly developed digital type marking machine featured by its cost effective and ease of operation has replaced the original imported matrix-type marking machine in the production.
研制的数字化喷号机替代了进口矩阵型针式打号机用于生产。设备成本低，维护操作简单。
3
Note that the inv function USES SPL nested lists to represent matrices, as there is no matrixtype in SPL.