Cov khoom ntawm lub nruas wrapping nplaum

Cov khoom siv roj hmab yog qhov tseem ceeb hauv kev ua kom ntseeg tau qhov hnav tsis kam ntawm lub nruas ntim, thiab cov khoom siv roj hmab cuam tshuam rau qhov zoo ntawm lub ntim. Yog li ntawd, nws yog ib qho tsim nyog yuav tau xaiv cov roj hmab ntau yam uas ua tau raws li kev lag luam thiab mining tej yam kev mob. Cov hom ntim tseem ceeb hauv kev ua lag luam yog cov roj hmab tuaj yeem thiab cov roj hmab hauv tsev. Feem ntau, cov roj hmab hauv tsev feem ntau yog siv rau kev lag luam thiab mining tej yam kev mob, thaum rau hnyav industrial thiab mining tej yam kev mob, siab hnav resistant roj hmab daim hlau mas los ntawm txawv teb chaws feem ntau yog siv.