Мисля, че е това. Не е точно запояване, защото липсва припой, но е пак метод за трайно електрическо съединяване на изводите на електронни елементи. Виждал съм го само в стари устройства за промишлена автоматика, но може да има и съвременни приложения, не знам.

"In 1952, a new technology was discovered by The Bell Laboratory, Western Electric Company to form a consistent gas-tight electrical connection by tightly wrapping wire around a terminal with two sharp edges. This advanced technology would open the door to meet the needs of more complex electronic equipment, allowing for more terminals in less space. Since then, the electronic, telecommunication and aviation industries have recognized wire wrapping as the most reliable, stable and common method of connecting signal and power terminals in today’s advanced work force."
http://www.tecratools.com/pages/tecalert/wirewrap_guide.html