long, cylindrical tube clear or transparent multiple ends with one end attached to a machine curved or flexible sections a valve at the end to control airflow tubing or hoses connecting the ends to other machines
airway which has long, cylindrical tube airway which has clear or transparent airway which has multiple ends with one end attached to a machine airway which has curved or flexible sections airway which is a valve at the end to control airflow airway which has tubing or hoses connecting the ends to other machines