Ishni bajarish tartibi: Quruq probirkaga uning 2/3 hajmigacha (2-3g) natriy asetat bilan natron ohak (1:2 og`irlik nisbatda) aralashmasidan solib, probirkani shtativ qisqichiga qiyalatib qo`ying. Probirkaning og`zini gaz o`tkazgich nayi bor tiqin bilan berkiting.
|
0
|
|