Assertion: main parachute | /r/HasProperty | based on ring
Facets:
Source sentences:
text: In the 1970s sports skydiving became very popular thanks to a quick-release system of the main parachute based on the three rings or rings, designed by engineer Bill Booth, that allowed anyone to use it.[citation needed]
text: In the 1970s sports skydiving became very popular thanks to a quick-release system of the main parachute based on the three rings or rings, designed by engineer Bill Booth, that allowed anyone to use it.[citation needed]