Gat ntsa hta grau sawng ai chair lift ni gaw pneumatic hte spiral ni rai nga ai. Lift chair gaw, lang ai shaloi, tingnyang a amyu, arung arai hte hkrang masa hku nna, tingnyang kaw nna yu hkrat wa ai ladat amyu myu nga ai. Ndai zawn shakut yu na matu ngai hpaji jaw mayu ai:
1. Air lift chair: Dai gaw tingnyang nnan langai mi re. Dai kata na jak hta cylinder nga ai. Dai cylinder kata na piston rod gaw swivel tingnyang hpe madi shadaw na matu ntsa de hte lawu de shamu shamawt nga ai. Gas pressure rod hta nitrogen gas hte hpring nga ai, raitim, gas a san seng ai lam gaw 90% hta npu rai yang, lift chair lang ai shaloi, shim lum lam hta hkrit tsang hpa byin chye ai. Gas pressure rod hpe n-gun n rawng ai hku n pat da ai rai yang, gas hpe kabai kau na re (hpaji rawng ai tingnyang hpe mari ra ai) . Dai tingnyang hpe jahkrat dat ai shaloi, tingnyang ntsa kaw dung nna, dung shara a lawu daw kaw na joystick hpe sharawt ra ai, hkum hkrang a n-gun hte loi loi hte n-gun shayawm lu ai.
2. Free-style gas spring lift tingnyang: Dai gaw, npawt nhpang hta loi loi sha rai nga ai, cylinder kata na piston, shinggan piston rod hte hpaw da ai cylinder langai mi lawm ai. Cylinder kata na nbung n-gun gaw shinggan na hta grau kaba nna, cylinder kata na piston a maga lahkawng maga hta hka htung kaji ni nga ai. Lapran jawng a physics machye machyang hku nga yang, piston rod hpe kata de dip nna, ninghkap ai lam gaw n galai shai ai. Ndai aten hta, control rod kaw nna ntsa de lung wa ai hku nna, tingnyang ntsa de yu nna, ntsa de lung wa na matu loi ai.
