Kev ua haujlwm ruaj khov thiab txhim khu kev qha hauv txhua qhov xwm txheej:
Tsim los nrog kev tiv thaiv kev tiv thaiv siab tshaj, dhau-voltage, thiab dhau-tam sim no tiv thaiv circuits, peb cov teeb liab teeb tuaj yeem tiv taus qhov hloov pauv hluav taws xob thiab hluav taws xob cuam tshuam. Qhov no ua kom lawv yuav ua haujlwm tau zoo txawm tias nyob hauv ib puag ncig uas muaj kev cuam tshuam hluav taws xob lossis hauv thaj chaw uas tsis muaj zog txaus. Cov khoom tsim sab hauv yog tsim los ua kom lub neej ntev, kev cia siab, thiab kev xav tau kev saib xyuas tsawg, uas ua rau txo qis tag nrho cov tswv cuab ntawm nws lub neej.
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