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