O yɔrɔ min be weele ko shell ani tube, o be kɛ ni fani, nɛgɛ, tube ani kungolo ye. O la, jii kelen (a ka ca a la, jii nɛnɛnin) be bɔ tubo gɛrɛfɛ, ani jii tɔɔ (a ka ca a la, jii kalaman min ka ca) be bɔ nɛgɛdaga gɛrɛfɛ. Ka sabu kɛ funteni danfara ye min be u fila cɛ, funteni be bɔ jii la min ka bon-temperature jii la ka taga jii la min ka dɔgɔ-temperature jii la, o cogo la, a be funteni yɛlɛmani faamu.
Kɛrɛnkɛrɛnniya la, ni jii gwansan donna nɛgɛdaga gɛrɛfɛ, a ka funteni be yɛlɛma jii nɛnɛman na min be nɛgɛ gɛrɛfɛ kogo fɛ. O funteni yɛlɛmani fɛɛrɛ tɛ baara kɛ ka ɲɛ dɔrɔn, nka a be se ka jii ka funteni hakɛ fana kɔlɔsi. Ka fara o kan, shell ni tube funteni yɛlɛmalan fana be se ka dilan i n’a fɔ kelen kelen-pass wala multi{3}}pass structure ka kɛɲɛ ni makoya yɛrɛ yɛrɛw ye walisa ka funteni yɛlɛmani sariyaw dafa.