The opening and closing of a valve is respectively done by
La apertura y el cierre de una válvula se realiza respectivamente mediante
a. Gas pressure and cam
b. A spring and a cam
c. Wheel and spring
d. Cylinder vacuum and spring
e. A cam and a spring
La apertura y el cierre de una válvula se realiza respectivamente mediante
a. Gas pressure and cam
b. A spring and a cam
c. Wheel and spring
d. Cylinder vacuum and spring
e. A cam and a spring
Respuesta:
A cam and a spring
Explicación: