If the Country of Origin is Denmark and the year of introduction is 1962, what is the primary cartridge?
CREATE TABLE "table1_26389588_1" (
  "name_designation" text,
  "year_of_introduction" text,
  "country_of_origin" text,
  "primary_cartridge" text,
  "primary_user" text
);
SELECT "primary_cartridge" FROM "table1_26389588_1" WHERE "year_of_introduction"='1962' AND "country_of_origin"='Denmark';