Cov Tub Ntsej Hlau Hlau Rectanger - Royal pawg

Rectangular Yeeb Nkabyog hollow sawb ntawm hlau, tseem hu ua cov yeeb nkab tiaj, tiaj square yeeb nkab lossis square tiaj tus yeeb (raws li lub npe qhia). Nyob rau tib lub sij hawm ntawm kev khoov thiab tergeal zog, lub teeb hnyav, yog li nws tau siv dav hauv kev tsim cov tshuab kev ua haujlwm thiab cov qauv ua haujlwm.
Coob tus kav dej siv rau cov roj ua kua, thiab roj, roj, yog li, yog li, yog li, yog li, yog li, yog li, yog li ntawd, nyob rau hauv kev tsim cov tshuab kev ua haujlwm thiab cov qauv tsim khoom. Kuj tseem siv rau kev tsim cov riam phom sib xyaw, cov ntoo ris, plhaub, lic.
Square yeeb nkab siv tau ntau yam hauv kev sib cav ua haujlwm thiab cov khoom siv hluav taws xob ntawm kev tsim kho cov hlau - Square Yeeb Nkab ntawm lub luag haujlwm tseem ceeb hauv kev ua haujlwm.