If you do not have a special needle for inflating nipple of a volleyball or soccer ball, take advantage of… ordinary medicine dropper with an elongated spout. Rubber part is a bit cut and put on the pump hose, and the glass type in the pin hole of the ball. Pumped the ball a “needle” much quicker. N. ZHIRKOV, Lipetsk
Recommend to read
THE ANTENNA… HIGH-SPEED MANUFACTURING
Once, while on vacation with an overnight stay in a tent on a wooded Bank of the river, found an annoyance: a portable TV operating off the car battery, bad was shown on the set of the...
THE INSTRUMENT FOR TESTING LOW-POWER TRANSISTORS
For its production you will need two capacitors, a resistor and phone capsule (see diagram). Removing the insulation pad under the membrane of the phone parts are mounted directly in the...
