Fais fab tsheb yog qhov yooj yim ntawm kev thauj mus los, uas tuaj yeem siv dav hauv chaw ua haujlwm, logistics thiab kev tsim cov teb.

Roj teeb yog ib qho ntawm cov hluav taws xob siv hluav taws xob ntawm hluav taws xob tsheb.