Kutengera ndi mtundu wa katundu, zikopa zosiyanasiyana zitha kugwiritsidwa ntchito. Chidebecho chimakhala ndi bowo pamwamba, valavu imodzi, ndi valavu ina pansi. Amapangidwa ngati masilinda.
Matanki a cryogenic amakhala osasunthika, zotengera zoponderezedwa zokhala ndi zotsekemera zotsekera kuti zisungidwe kwanthawi yayitali zakumwa zoziziritsa kukhosi zokhala ndi zida zodziyimira pawokha monga kukulitsidwa kwa polyurethane ndi kutsika kwa evaporation.
