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 kua dej, xws li roj, dej, roj, yog li nws tseem dav siv nyob rau hauv Qhov chaw tsim cov tshuab tshuab thiab cov qauv txua. 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 ke thiab cov chaw sib txuas, cov tshuaj tiv thaiv hluav taws xob thiab cov ntaub qhwv hluav taws xob ntawm kev tsim kho cov hlau - square yeeb nkab ua si ib tug heev Lub luag haujlwm tseem ceeb hauv kev tsim kho kev tsim kho.