Ahantu ho gukoreshwa
Gusimbuza icyiciro cya kabiri
Inganda ntoya n’inganda zicukura amabuye y'agaciro
Plant uruganda rukora umuyaga
Amahoteri, amazu yubucuruzi, inyubako zo mu biro, ibigo byubucuruzi, nibindi
◆ C- umutwaro wo guhindura ibintu
◆ D-umurongo woguhuza umugozi
◆ De - umurongo wa kabili uhuza hamwe na sisitemu yo guhinduranya
◆ F-umutwaro uhindura fuse ihuza igice
Unit V-vacuum yamashanyarazi yamashanyarazi