Ka jingkhein ia ki jingheh jong ka jingkieng dieng ryngkat bad ki tnum .
Sngewbha pyni ia ki jingthew ba donkam ha ki milimeter .
X - ka jingjrong jong ka jingplie
Y - Ka jingjrong jong ki step
Z - Ka jingheh jong ki step
C - Ka jingkhein ia ki step
W - Ka jingkhluit jong ka step
F - Ka jingjrong jong ki step
T - ka jingkhluit jong u nar bow lane nar
H - Pyni ia ki riser
LR - ka liang jong ki jingkieng
SP - Ka jaka jong ka step kaba nyngkong kaba iadei bad ka kyrdan jong ka mala jong ka mala kaba ar
Ki jinglah jong ka prokram.
Ka jingkhein ia ka jingpynwandur kaba suk ia ka jingkieng dieng ha ki tnum bow.
Ka jingpynbeit ia ka jingdonkam jong ki tiar.
Ka jingthew kaba thikna jong baroh ki bynta.
Ki dur bad ki dur ba bniah jong baroh ki bynta jong ka step.
Ki jingai jingmut na ka bynta ka jingsuk jong ki step.
Ia ka jingkhein ia ka jingsuk jong ki step la khein da kaba pyndonkam ia ka formula kaba pynshong nongrim ha ka jingjrong jong ki step.
Ka jingjrong jong ka step jong u briew ka long naduh 60 haduh 66 cm, bad ka jingjrong kaba pdeng ka long 63 cm.
Ka jingkieng kaba suk ka iadei bad ka formula: 2 tylli ki jingjrong + ka jingjylliew = 63±3 cm.
Ka jingkynriah kaba suk tam jong ki step ka long naduh 30° haduh 40°.
Ka jingjylliew jong ki step jong ki step ka dei ban iadei bad ka jingheh jong ki juti 45 - ym duna ia ka 28-30 cm.
Ia ka jingbym don ka jingjylliew lah ban pyndap da ka jingmih shabar jong ka step.
Ka jingjrong jong ka step ka dei ban long haduh 20-25 cm.