笔心 meaning in English

1.(铅笔心) pencil lead
2.(圆珠笔心) refill (for a ball-point pen)

Give or get an electric shock person s revolver passes consistently upscale revolver to the friend , he a press and go to and then there will be the felling for get an electric shock ! frighten him a jump greatly ! safe electric voltage , have no danger to the person
安全电压，对人无危险电人写字两用笔外表仿如真笔，只要一做按笔心的动作，手指立刻感到电击的感觉，电流小不会触电，安全无虑。