Txawm hais tias tus qauv ntawm bolted pob qhov chaw thav duab engineering project yog ruaj khov, tab sis nws kuj tseem yuav ua rau qee qhov kev puas tsuaj vim qee cov ntsiab lus me, vim tias lub pob bolted qhov chaw thav duab yog qhov tseem ceeb ntawm kev tsim vaj tsev, yog qhov tseem ceeb heev, yog li thaum muaj kev puas tsuaj tshwm sim, nws yuav tsum ua tam sim ntawd ...
Nyeem ntxiv