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