1950
地下水道 Kanal 1957
1950
1980
1980
2000
1930
1960
2020
2000
1960
1960
2010
1990
1970
1990
1990
1990
1980
1920
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990