dūtóng
дутун
ду1 тун2
http://www.chinese-russian.com/zd/ci/47341
dūtǒng
ду1 тун3
http://www.chinese-russian.com/zd/ci/47362
dùtóng
ду4 тун2
http://www.chinese-russian.com/zd/ci/185359
dùtòng
ду4 тун4
http://www.chinese-russian.com/zd/ci/53043