micrometer

344-359) describes a micrometer in which a negative lens is introduced between the eye-piece and the objectglass.

图象微表与分开的透镜。各各样的微表被发明了除heliometer 以量由象。Ramsdens 屈光的微表包括一个分开的透镜被安置在一台地球望远镜的架设的眼睛管的最内在的透镜的共轭焦点。

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.

镜下观察旋毛虫幼虫卷曲状态,用微尺随机量囊包长、宽。