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

The City Watch barracks is a centre for pursuits worthy of true soldiers, a place for exercises, drill and weapons practice.

警备军营作为实战步兵基地，提供各种操练和武器练习设施。

youdao

Plans to drill boreholes in Manchester city centre to extract underground heat for 6, 000 homes and businesses have been unveiled.

BBC: Newcastle borehole project