Under the auspices of Saudi Ambassador to Morocco Dr. Mohammed bin Abdulrahman Al-Bisher, Saudi Investment Industrial Exhibition was opened in Casablanca on Tuesday. More than 20 Saudi companies and factories are taking part in the three-day exhibition which coincides with the convention of Saudi-Moroccan Business Council scheduled here later today. It is noteworthy that Saudi Arabia is the fourth trading partner to Morocco and bilateral trade exchanges amounted to more than $ 23 billion last year.