| 摘要 |
Four wind sampling cups arrayed to the compass points are connected respectively to the tops of manometer tubes. The four tubes are supplied fluid at a bottom end by two pairs of chambers, the chambers of a pair being connected to one another. The manometer tubes of oppositely directed wind sampling cups share connected chambers, such that wind from a given direction drops the fluid level in the attached manometer and raises the fluid in the opposite manometer.
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