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