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TROUGHTON & SIMMS, LONDON, LONDON; 19TH CENTURY
细节
An English lacquered-brass range finder,
TROUGHTON & SIMMS, LONDON, London; 19th Century
the telescope with rack and pinion focusing, mounted on twin Y-frames and with double-bubble level on horizontal bar limb, with roller and sliding fine adjustment for elevation, with rack and pinion motion, tangent-screw fine adjustment and index pointer to horizontal range scale graduated 1500-12000, the vertical support with graduated drum with horizontal adjustment and pointer, the circular base with micrometer adjustment for azimuth motion, mounted with a level and cross bubble, with adjusting handle over the micrometer screw box engraved DEPRESSION RANGE FINDER W. OTTWAY AND CO LIMITED EALING LONDON, the lower horizontal circle graduated 0-360°, on three adjustable screw feet
56cm. (22in.) wide overall
TROUGHTON & SIMMS, LONDON, London; 19th Century
the telescope with rack and pinion focusing, mounted on twin Y-frames and with double-bubble level on horizontal bar limb, with roller and sliding fine adjustment for elevation, with rack and pinion motion, tangent-screw fine adjustment and index pointer to horizontal range scale graduated 1500-12000, the vertical support with graduated drum with horizontal adjustment and pointer, the circular base with micrometer adjustment for azimuth motion, mounted with a level and cross bubble, with adjusting handle over the micrometer screw box engraved DEPRESSION RANGE FINDER W. OTTWAY AND CO LIMITED EALING LONDON, the lower horizontal circle graduated 0-360°, on three adjustable screw feet
56cm. (22in.) wide overall
注意事项
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