1950
地下水道 Kanal 1957
1950
1990
2010
2000
1980
1930
1960
2000
1990
2000
1910
1980
1950
1960
1970
2000
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