1950
地下水道 Kanal 1957
1950
1920
1980
1980
1980
1940
1970
1980
1950
1990
1950
2000
2010
1950
1960
1980
1990
1980
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