Gram hnyav yog ib chav tsev uas txhais cov thickness ntawm daim ntaub. Chav tsev yog "g / m2" (g / m2), uas yog abbreviated li FAW. Piv txwv li, feem ntau hais lus, 50g txhais tau hais tias cov ntaub yog 50g / m2, thiab 100g txhais tau tias cov ntaub yog 100g / m2, 50g los yog 100g. Nws feem ntau hu ua 50g lossis 100g hauv kev lag luam. Nws tsis yog qhov hnyav ntawm daim ntaub, tab sis yog siv los ntsuas qhov tuab thiab tuab ntawm daim ntaub. Qhov hnyav dua gram, qhov tuab ntawm daim ntaub, qhov hnyav dua gram, qhov ntau dua qhov kev ua haujlwm nyuaj, qhov zoo dua qhov zoo thiab tus nqi kim dua tus txheeb ze. Qhov qis ntawm gram hnyav, qhov phem qhov zoo thiab tus nqi qis dua.
Hauv kev xyaum, gram qhov hnyav yog qhov tseem ceeb ntawm qhov cuam tshuam rau kev nqus dej thiab kev nplij siab. Rau tib daim ntaub, qhov hnyav dua gram, qhov nqus dej zoo dua, thiab qhov hnyav dua gram, qhov nqus dej tsis zoo!