Compressed air gun has rear opening of cylinder connected to transparent cylinder within which is located piston rod which by compressed air through hose pushes piston disc forwards

摘要

The compressed air gun (A) has the rear opening (5) of the cylinder (1) connected to a transparent cylinder (7) within which is located a piston rod (8) which by compressed air through a hose (12) pushes a piston disc (4) forwards.