If the Country of Origin is Denmark and the year of introduction is 1962, what is the primary cartridge?
create table table_26389588_1 (primary_cartridge varchar, year_of_introduction varchar, country_of_origin varchar, PRIMARY KEY (primary_cartridge))
select primary_cartridge from table_26389588_1 where year_of_introduction = "1962" and country_of_origin = "denmark"