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所屬行業：石化行業

Switzerland>>

Switzerland, known as the Swiss Confederation in full, is one of the Central Europea……
Serbia>>

Serbia, known as the Republic of Serbia in full, is a landlocked country located in ……
Portugal>>

Portugal, known as the Portuguese Republic in full, is a Republican country in south……
The European Union>>

The European Union, known as EU for short, with its headquarters in Brussels, capit……
Malta>>

Malta is an island country in the middle of the Mediterranean, known as "the heart o……