Mabotolo a Dewar, omwe amadziwika kuti mabotolo a Dewar kapena vacuum flasks,
Chithandizo cha kutentha kwapambuyo pa weld chimafuna kuthetsa kupsinjika kotsalira ndikukulitsa kulimba kwa kutentha kwapang'onopang'ono.
Ubwino wa zotengera zotsika kutentha zimadalira kwambiri zinthu zomwe zimagwiritsidwa ntchito, makamaka zitsulo zotsika kwambiri.
Kuwotchera m'malo otentha kwambiri kumabweretsa zovuta zapadera zomwe zimafuna luso lapadera komanso ukatswiri.
M'malo ovuta kwambiri okhala ndi kuzizira kwambiri, kusankha zida zoyenera zotsika kutentha kumakhala kofunika kwambiri kuti zisungidwe bwino komanso magwiridwe antchito.
Onani ntchito yofunikira yaukadaulo wozizira kwambiri m'matanki osungira osatentha kwambiri ndi nkhaniyi.
Opaleshoniyo iyenera kuwongolera kuchuluka kwamadzimadzi ndi kuthamanga kuti zisapitirire mtengo womwe watchulidwa, ndipo nthawi yomweyo, mulingo wamadzimadzi uyenera kuyang'aniridwa motsutsana ndi malowo kuti asadzaze.
