Experimentation equipment for teaching in schools or colleges uses a tubular body closed at one end and housing a piston, which has an internal channel and stops to maintain it in position

摘要

Device uses a tubular body (11) closed at one end and housing a piston (13), which defines a variable volume (15). The piston has an internal channel (16) and stops (19-20) to maintain the piston in position relatively to the tube.