micrometer

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

双重图象微表与分开的透。各各样的微表被发明了除heliometer 以外为量由重象。Ramsdens 屈光的微表包括一个分开的透被安置在一台地球望远的架设的眼睛管的最内在的透的共轭焦。

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.

观察旋毛虫幼虫卷曲状态,用微尺随机量囊包长、宽。