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弧秒 hú miǎostresses
tech. арксекунда; дуговая секунда; секунда дуги; угловая секунда
弧秒 量度角度的单位, 即角分的六十分之一 hú miǎo
med. угловая секунда
弧 秒
: 3 phrases in 2 subjects
Astronomy1
General2

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