344-359) describes a micrometer in which a negative lens is introduced between the eye-piece and the objectglass.
双重图象测微表与分开
透
。各种各样测微表
发明了除heliometer 以外为测量由重象。Ramsdens 
测微表包括
个分开透
置在台地球望远架设眼睛管最内在透共轭焦点。
344-359) describes a micrometer in which a negative lens is introduced between the eye-piece and the objectglass.
双重图象测微表与分开透。各种各样测微表发明了除heliometer 以外为测量由重象。Ramsdens 测微表包括个分开透置在台地球望远架设眼睛管最内在透共轭焦点。
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