Okubala ekisenge ekiyitibwa arch ku bbugwe wa picket
Laga ebipimo ebyetaagisa mu milimita
H - obuwanvu bw’olukomera obutono ennyo
Y - obuwanvu bw’olukomera obusinga obunene
X - ebanga wakati w’amasekkati g’eggaali y’omukka ey’ebweru
Z - obugazi bw’eggaali y’omukka eya picket
K - Omuwendo gw’eggaali y’omukka mu kitundu
D - Ebanga wakati w’eggaali y’omukka
Singa obuwanvu
Y > H
Singa obuwanvu
Y < H