Cov hlab ntim cov hlab ntsha muaj xws li lub raj thauj khoom, tshuaj siv tshuaj, ziab, nres & capping, nqus tsev, lub tais ntim khoom, thiab lwm yam. Ua haujlwm yooj yim & nyab xeeb nrog tus neeg PLC & HMI tswj, tsuas yog xav tau 2-3 tus neeg ua haujlwm tuaj yeem khiav tag nrho cov kab zoo.