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