Assertion: electric detonator | /r/HasProperty | invented by swedish company
Facets:
value: in the 1960s
type: TEMPORAL
value: in 1970s
type: TEMPORAL
Source sentences:
text: Non-electric detonators were invented by the Swedish company Nitro Nobel in the 1960s and 1970s, and launched to the demolitions market in 1973.
text: Non-electric detonators were invented by the Swedish company Nitro Nobel in the 1960s and 1970s, and launched to the demolitions market in 1973.