1950
地下水道 Kanal 1957
1950
2000
2000
1990
1970
1990
2020
1970
1990
2010
1950
2020
2000
1990
1990
1990
1990
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
2000
2000
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990
1990