Drill a hole in the centre of the blank PCB so that the copper pipe is a tight fit in the hole.

在空白电路板的中间钻一个小孔，使得铜管正好紧紧地固定在中间。

youdao

Drill a hole in the centre of the blank PCB so that the copper pipe is a tight fit in the hole.

在空白电路板的中间钻一个小孔，使得铜管正好紧紧地固定在中间。

youdao