2021 zoo steel qauv cov tub ntxhais hluas qoj kev cob qhia rau cov menyuam yaus 6 txog 12 xyoo

Qhov no yog sab nraum zoov steel qauv tub ntxhais hluas lub zog kev cob qhia cheeb tsam project.

Cov khoom siv tseem ceeb ntawm kev cob qhia cov tub ntxhais hluas yog cov hmoov txheej hlau, aluminium haum, nce toj net.

SPIRIT yog thoob ntiaj teb tus qauv kev cob qhia cov tub ntxhais hluas lub cev muaj zog hauv Suav teb.

Lub peev xwm ntawm kev cob qhia cov hluas yog 40 tus menyuam.