O site oficial da Marvel tem este diagrama dos web shooters do Homem-Aranha:
A entrada da Wikipedia sobre o cinto do Homem-Aranha afirma simplesmente que o Homem-Aranha "pode fazer muitas coisas com suas teias "e lista muitos tipos diferentes de correias (as que você listou incluídas). Todos esses diferentes tipos de correias vêm dos mesmos atiradores; eles apenas ocorrem quando os dispositivos de pulso são usados de maneira diferente.
Para parafrasear o Wiki da Marvel (grifo meu):
The wristlets had sharp steel nipples which pierced the bronze caps when the cartridges were tightly wedged into their positions. The hand-wound solenoid needle valve was actuated by a palm switch that was protected by a band of spring steel which required a 65 pound pressure to trigger... The effect of the very small turbine pump vanes was to compress (shear) the web fluid and then force it, under pressure, through the spinneret holes which cold-drew it (stretches it: the process wherein nylon gains a four-fold increase in tensile strength), then extrudes it through the air where it solidified. As the web fluid exited the spinneret holes, it was attracted to itself electrostatically and thus could form complex shapes. The spinneret holes had three sets of adjustable, staggered openings around the turbine which permitted a single web line, a more complex, spun web line, and a thick stream... The 300 p.s.i. pressure in each cartridge was sufficient to force a stream of the complex web pattern an estimated 60 feet (goes significantly further if shot in a ballistic parabolic arc).