Gịnị bụ aha ngwaọrụ mgbachi maka nnwale kpo oku?
A na -akpọ ha – mkpọchi, jikọtara n’etiti sistemụ: enwere mkpọchi mmiri, mgbochi mmiri; na -ejikwa ngwa mmeghachi omume: tweezers, clamps test test, clamps crucible.