Ko David, te kamupene taiaho o Amerika, te kaihanga matua o te karetao whakarewa ipu. I roto i te hanga o te karetao, ka whakamahia te mīhini tapahi taiaho muka IPG hei tapahi i te rauemi.
I whakapā atu a David ki a S&A Teyu ki te hoko i te pouaka whakamatao ahumahi hei whakamatao i te rēseri IPG. I tūtohu a S&A Teyu kia whakamahia e ia te pouaka whakamatao pāmahana rua a S&A Teyu CWFL-3000 hei whakamatao i te rēseri muka IPG o te 3000W. He pouaka whakamatao pāmahana rua a S&A TeyuCWFL-3000 He mea hanga mō te muka reiti, me te kaha whakamatao o te 8500W, ā, ko te tika o te whakahaere pāmahana tae atu ki te ±1℃. E rua ngā pūnaha whakahaere pāmahana motuhake o te S&A Teyu double temperature refrigerator, motuhake mō te pāmahana teitei me te pāmahana iti. Ka whakamatao te pūnaha pāmahana iti i te tinana reiti, ā, ka whakamatao te pāmahana pumau i te pane tapahi, ka taea te karo i te hanganga o te wai whakapūmau; mō ngā whakaritenga teitei o te muka reiti mō te wai whakamatao, kua rite ki te tātari mimiti katote me te mahi kimi, kia taea ai te pure me te whakamatao i te wai, kia tutuki ai te hiahia o ngā muka reiti.Mā ngā tauira whānui, kua whānui haere te whakamahinga o te pūnaha whakamatao TEYU i ngā mara katoa, ā, kua whakatūria he ingoa waitohu pai rawa atu i roto i te umanga mā te whakahaere tika, te whakahaere mohio, te whakamahi haumaru, te tiaki pūngao me te tiaki taiao, e mōhiotia ana ko "Tohunga Whakamatao Ahumahi".
