A lever operates a powerful fan and a suction hole slides open: the air stream carries the waste away. Source: Internet
In 1962, Philip Farkas hypothesized The Art of Brass Playing, Philip Farkas, 1962 that the air stream traveling through the lip aperture should be directed straight down the shank of the mouthpiece. Source: Internet
Fuel is introduced into the air stream through small holes at the narrowest part of the Venturi and at other places where pressure will be lowered when not running on full throttle. Source: Internet
Perhaps the most important tests were conducted by the XB-29G; it carried prototype jet engines in its bomb bay, and lowered them into the air stream to conduct measurements. Source: Internet
He believed that it would be illogical to "violently deflect" the air stream downward at the point of where the air moves past the lips. Source: Internet
Each valve pressed diverts the air stream through additional tubing, individually or in conjunction with other valves. Source: Internet