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。各各样测微表被发明了除heliometer 以外为测量由重象。Ramsdens 屈光测微表包括一个分开被安置在一台地球望远架设眼睛管最内在共轭焦点。
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。各各样测微表被发明了除heliometer 以外为测量由重象。Ramsdens 屈光测微表包括一个分开被安置在一台地球望远架设眼睛管最内在共轭焦点。
The coiled shapes of Trichinella isolated ML were observed under microscopes,then the lengths and widths of ML encystment(encysted index)were measured at random by micrometer.
下观察旋毛虫幼虫卷曲状态,用测微随机测量囊包长、宽。
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