Anhte yawng chye ai gaw, rubber gaw wan n-gun n rawng ai, insulator langai mi re, dai majaw wan n-gun wire hte cable ni a shinggan na hkum hkrang, wan n-gun hte galaw ai ni a hpun palawng ni, etc.} ni hpe rubber. Raitim, n-gun n rawng ai rubber ni mung manghkang byin shangun ai..
Kalang mi hta, United Kingdom mungdan na nhprang wan n-ga kata kaw bawm kapaw ai lam byin wa ai majaw, hkrat sum ai lam kaba ni byin wa ai., hkala nba byin ngut ai hpang, ndai tsin- nye a{2}} Ndai hkrit hpa makoi magap da ai hkrit tsang hpa hpe gara hku yeng seng kau na kun?
Hpang e, rubber arung arai ni hpe galaw shapraw ai lam hta, graphite powder, acetylene nsam hpraw, conductive black or metal powder hpe jat bang nna, dai gaw rubber hpe wan n-gun hte galaw ai wa{. de galai shai kau ya ai.
1990 ning hta tape, dai zawn sha, bawm kapaw chye ai switch, sensor hte kaga ni hta gara hku rai nga ai. hta lawm ai.