faller guide bar;faller guide

Theoretical investigation of cleaning technique for the water needle plate;

水针板清洗技术的理论探讨

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。