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
透镜。各种各样测微表被发明了除heliometer 以外为测量由重象。Ramsdens 屈光测微表包括
个透镜被安置在台地球望远镜架设眼睛管最内在透镜
焦点。
344-359) describes a micrometer in which a negative lens is introduced between the eye-piece and the objectglass.
双重图象测微表与透镜。各种各样测微表被发明了除heliometer 以外为测量由重象。Ramsdens 屈光测微表包括个透镜被安置在台地球望远镜架设眼睛管最内在透镜焦点。
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