Tswv yim
Phim formula chaw
Qhov tob txaus cov kauj ruam
Kab ntsab staircase inclination 39.8°
Kab ntsab stairs
ces saib
pem hauv paus saib
Kauj ruam tswvyim
sab saum toj saib
Qhib lub teeb duab
Cov theem drawing
Qhov ntaub ntawv
The stairs rau nws 2500 hli
Qhov ntev ntawm tus stair qhib rau 3000 hli
Cov nab npawb ntawm cov kauj ruam 13
Thickness ntawm cov kauj ruam 50 hli
Cov kauj ruam qhia 50 hli
Qhib txoj hlua stairs
Qhov ntev ntawm txoj hlua qhib 3873 hli
Ntawm lub kaum sab xis ntawm the stairs 39.8°
Luaj li cas ntawm cov kauj ruam
Nws txawj 192 hli
Le theem 281 hli
Nws yog podstupenka 142 hli
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