Rau ntau tus engineers electronics, tej zaum, lawv yog cov kws tshaj lij hauv kev tsim lawv cov PCB boards, thiab lawv kuj paub meej tias qhov chaw ua haujlwm zoo li cas lawv cov PCB yuav raug siv rau hauv, tab sis lawv tsis muaj lub tswv yim los tiv thaiv lawv cov rooj sib tham thiab cov khoom siv thiab txuas ntxiv mus. ..
Nyeem ntxiv