Qhov txhaj tshuaj pwm yog tsim ntawm ob peb daim hlau phaj nrog ntau qhov chaw, uas tau muab faib ua peb qho:
Ib tug qauv ntaus ntawv (tuag, punch)
B cov cuab yeej muab khi (taw qhia cov qauv, cov tes taw qhia)
C fixing ntaus ntawv (I-puab phaj, code aub)
D txias zog (qhov ntws tawm)
E qhov kub thiab txias (cua sov tube, kub xaim)
F khiav lawv (Jack Tsui qhov raws, qhov channel)
G ejector system (ejector tus pin, sab saum toj qws)
