Noguera Cundar AP, Viteri Núñez EF, Noguera Cundar AJ, Cárdenas Chávez JS. Design and manufacture of a tennis ball launcher machine . CCD [Internet]. 2022Dec.17 [cited 2024Nov.22];5(4.1):286-01. Available from: https://cienciadigital.org/revistacienciadigital2/index.php/ConcienciaDigital/article/view/2468