Before revision: 90, 91 and 95. was a type of river craft, used in the second half of the 19th century and first half of the 20th century on many European rivers
After revision: 90, 91 and 95. was a type of river craft, used in the second half of the 19th century and first half of the 20th century on many European riversThis system is still used at Riqueval Tunnel of Canal de Saint-Quentin in France.