revolution-cylindrical-cylindrical-cylindrical RCC

revolution-cylindrical-cylindrical-cylindrical(RCCC) mechanism

Cylindrical Valve

cylindrical valve control

cylindrical valve for hydraulic turbine

cylindrical valve seat

high cylindrical valve

additional air slide valve

air slide valve

balanced slide valve

circular port slide valve

cold-wall slide valve

cut slide valve

cut-off slide valve

distributng slide valve

double [ported] slide valve

double disc slide valve

double ported slide valve

double slide valve