Sao Tome and Principeimports of Gases, rare; argon was $1.66K . Sao Tome and Principeimported Gases, rare; argon from Portugal ($1.66K )Sao Tome and Principeimports of Gases, rare; argon was $1.66K . Sao Tome and Principeimported Gases, rare; argon from Portugal ($1.66K ).Gases, rare; argon exports by country in 2021