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Improvements in Drags for Soundings and other Hydrographical Purposes.
Improvements in Drags for Soundings and other Hydrographical Purposes.
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机译:改进了测深和其他水文目的阻力。
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摘要
454. Gutt, O. Jan. 7. Sounding-apparatus.-A drag a for supporting a sounding-instrument j, or for a similar purpose, has a box-shaped body having open ends b, c and openings d on all sides.
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