Tom qab cov chaw tsim khoom dhau qhov kev tshuaj xyuas ntau lawm, nws yuav tsum tau ntim thiab khaws cia hauv kev tsim khoom txhua hnub thiab lub neej. Tuj hnab tseem siv dav, yog li lub ntim zoo kuj tseem ceeb heev.
Yuav ntim cov hnab ntim li cas, cov chaw tsim khoom uas khaws thiab thauj tons ntawm lub hnab yuav tsum ntim, tom qab khaws cia thiab thauj mus los dhau qhov kev tshuaj xyuas ntau lawm. Hauv kev tsim khoom txhua hnub thiab lub neej, tons ntawm lub hnab tseem siv dav, yog li nws cov ntim zoo kuj tseem ceeb heev. Ua ntej ntawm tag nrho cov, thaum ntim, cov khoom ntawm ntau yam, qauv thiab specifications tsis pub nyob rau hauv txhua pob; txhua yam khoom yuav tsum muaj daim ntawv pov thawj kev soj ntsuam cov khoom tiav, suav nrog cov chaw tsim khoom lub npe, cov khoom npe, specification, kom muaj nuj nqis, tus qauv code, lub cim lag luam, hnub tsim khoom, thiab lwm yam. Lub ntim ntawm lub hnab ntim yuav tsum ruaj, tiaj tus thiab haum rau kev thauj mus los.
Saib ntawm nws qhov chaw khaws cia thiab kev thauj mus los. Thaum lub sij hawm thauj mus los, ton hnab khoom yuav tsum tsis txhob nyob ze rau hluav taws kub, tshav kub thiab ncaj qha tshav ntuj; lawv yuav tsum tau muab cia rau hauv qhov chaw txias, huv si, thiab lub sijhawm cia yuav tsum tsis pub tshaj 18 hnub txij li hnub xa khoom. hli.