1950
地下水道 Kanal 1957
1950
1970
1990
1990
2000
2020
1960
1990
1930
1990
2000
2010
1990
1970
1990
1940
1970
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
1990