Repeated Country Borders

Find the borders between two countries that occur more than once. They are separated in two sections: those which are repeated even without considering enclaves, and those which are repeated only if you consider enclaves.
Data from http://en.wikipedia.org/wiki/List_of_countries_and_territories_by_land_borders adapted to countries present in 'Countries of the World' quiz
Colour clues: borders that are at least triple (without considering enclaves) are highlighted
Quiz by scambigol
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Last updated: June 18, 2014
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First submittedJune 18, 2014
Times taken264
Average score66.0%
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A - Repeated without considering enclaves
 
B - Repeated only considering enclaves
Angola
DR Congo
 
Bangladesh
India
Argentina
Chile
 
Belgium
Germany
Armenia
Azerbaijan
 
Belgium
Netherlands
Austria
Switzerland
 
Germany
Switzerland
Azerbaijan
Iran
 
Italy
Switzerland
Bosnia and Herzegovina
Croatia
 
Kyrgyzstan
Tajikistan
Bosnia and Herzegovina
Serbia
 
Kyrgyzstan
Uzbekistan
Brunei
Malaysia
 
Tajikistan
Uzbekistan
Canada
United States
 
 
 
China
India
 
 
 
China
Russia
 
 
 
East Timor
Indonesia
 
 
 
France
Spain
 
 
 
Morocco
Spain
 
 
 
Mozambique
South Africa
 
 
 
Oman
United Arab Emirates
 
 
 
Romania
Ukraine
 
 
 
+1
Level 74
Jan 21, 2018
Do Estonia and Russia count? There's a lake that the border runs across, so it's not a land border.
+1
Level 74
May 6, 2020
what about Morocco and Spain? They share two borders in Ceuta and Melilla