A review on the physiology of Insulin like Growth Factor-I (IGF-I) ... by Debnath, Surajit / Advances in Environmental Biology.
The spring piston airgun generates power using a powerful spring-loaded piston that is housed within a compression chamber. Cocking the gun (using a break barrel, side lever, or under lever mechanism) causes the piston assembly to compress the spring. When the spring is released it pushes the piston forward compressing a column of air in the chamber behind the pellet.
Fig. 3 shows a typical fluid (gas-, air-, or liquid-powered) diaphragm pump. Its principle of operation is similar to plunger and piston pumps except that, instead of a plunger or piston, there is a flexible pulsating diaphragm that displaces the liquid.ig. 3 shows a typical fluid (gas-, air-, or liquid-powered) diaphragm pump. Its principle of operation is similar to plunger and piston pumps except that, instead of a plunger or piston, there is a flexible pulsating diaphragm that displaces the liquid.