automatic release mechanical firing head

combination firing head

hydraulic firing head

pressure firing head

sure-fire firing head

tripped firing head

hammer head [= hammer head shark]

head to head configuration

head to head structure

100p% firing level

4 corner tangential firing

50% firing energy

accuracy of firing

accuracy of firing data

air gun firing chamber

alternate firing

angle of firing

Annulus Pressure Firing

approved shot firing apparatus