1950
地下水道 Kanal 1957
1950
2000
2020
1990
1990
1950
1980
1960
1990
1990
1980
1990
1980
2010
1940
1950
1980
1990
1990
1990
1990
2000
2000
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