It can be of lighter construction and therefore be cheaper to build.
Ingaba sisakhiwo esikhaphu-khaphu ke ngoko esithobe ixabiso lokwakha 38361: Kwicala lenqanawa ezinkulu ixabiso lolwakhiwo lwesiqu senqanawa lwenza umlinganiselo ophezulu wexabiso lonke, umbono wenqanwa evaliweyo unika umdla kakhulu