Malangizo ogwiritsira ntchito valavu.

Njira yogwiritsira ntchito valavu ndi njira yowunikira ndi kusamalira valavu. Komabe, mfundo zotsatirazi ziyenera kuganiziridwa pogwiritsira ntchito valavu.

①Valavu yotenthetsera kwambiri. Kutentha kukakwera pamwamba pa 200°C, mabotolo amatenthedwa ndi kutalikitsidwa, zomwe zimakhala zosavuta kumasula chitseko cha valavu. Panthawiyi, mabotolo amafunika "kutenthedwa", ndipo sikoyenera kuchita kutenthetsa kutentha pamalo otsekedwa bwino a valavu, kuti tsinde la valavu lisafe komanso likhale lovuta kutsegula pambuyo pake.

②Mu nyengo yomwe kutentha kuli pansi pa 0℃, samalani kutsegula pulagi ya valavu ya mavavu omwe amaletsa nthunzi ndi madzi kuti achotse madzi oundana ndi madzi osonkhana, kuti mupewe kuzizira ndi kusweka kwa valavu. Samalani ndi kusunga kutentha kwa mavavu omwe sangathe kuchotsa kuchulukana kwa madzi ndi mavavu omwe amagwira ntchito nthawi ndi nthawi.

③ Chogwirira ntchito sichiyenera kukanikizidwa mwamphamvu kwambiri, ndipo kugwira ntchito mosinthasintha kwa tsinde la valavu kuyenera kupambana (ndikulakwitsa kuganiza kuti tsinde logwirira ntchito likamangika kwambiri, ndibwino kuti lifulumizitse kuwonongeka kwa tsinde la valavu ndikuwonjezera mphamvu yogwirira ntchito). Ngati palibe njira zodzitetezera, chogwiriracho sichingasinthidwe kapena kuwonjezeredwa pansi pa kupanikizika.

Pa nthawi ya opaleshoni, zinthu zachilendo zomwe zimapezeka mwa kumvetsera, kununkhiza, kuona, kukhudza, ndi zina zotero ziyenera kufufuzidwa mosamala pazifukwa zake, ndipo zomwe zili m'njira zawo ziyenera kuchotsedwa pakapita nthawi;

⑤ Wogwiritsa ntchito ayenera kukhala ndi buku lapadera la zolemba kapena buku lolembera, ndipo ayenera kusamala polemba momwe ma valve osiyanasiyana amagwirira ntchito, makamaka ma valve ena ofunikira, ma valve otentha kwambiri komanso opanikizika kwambiri, komanso ma valve apadera, kuphatikizapo zida zawo zotumizira. Ayenera kudziwika kuti zinthuzi ndi zofunika kwa wogwiritsa ntchitoyo, ogwira ntchito yokonza ndi wopanga. Ayenera kukhazikitsa buku lapadera lokhala ndi maudindo omveka bwino, lomwe ndi lothandiza polimbitsa kasamalidwe.