1950
地下水道 Kanal 1957
1950
1980
1970
1950
1970
1970
1980
1990
1990
1950
1980
1970
1980
1970
2000
1980
1940
1980
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
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