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