I-TRUNION-MOUND BALL
Ibhola ilungisiwe kwaye amakhonkco esihlalo ayadadayo, akhululekile ukuhamba ecaleni kwe-axis yevalve.Umthwalo wecala owenziwe ngoxinzelelo osebenza kwibhola ufuntshwa ngeebheringi.Kuxinzelelo oluphantsi isenzo sokutywinwa kwesitulo sifezekiswa ngokunyanzeliswa kwemithombo esebenza kumakhonkco esihlalo.Njengoko uxinzelelo lukhula uxinzelelo lwe-fluid lutyhala amakhonkco esihlalo ngokuchasene nebhola.