以下是瑞得电子经纬仪DT-02的产品中英文介绍：

瑞得电子经纬仪DT-02是一款性能可靠的测量仪器，采用绝对编码测角方式，结构简单，开机无需初始化，关机后再开机仍可显示原来的测角数据。其望远镜成像为正像，放大倍率为30倍，有效孔径45mm，分辨率3″，视场角1°30′，最小视距1.4m，视距乘常数100，视距加常数0，筒长157mm。测角精度为2″，最小显示读数1″/5″可选。长水准器精度为30″/2mm，圆水准器精度为8′/2mm。仪器尺寸为165×157×318mm，重量4.3kg，使用环境温度范围为-20℃～+45℃，配备可充电镍氢电池/AA电池，连续工作时间可达10小时。此外，该仪器还具备良好的防水防尘性能。

The Ruida DT-02 electronic theodolite is a reliable measuring instrument. It adopts the absolute encoding angle measurement method. The structure is simple. There is no need to initialize when starting up. After shutdown, it can still display the previous angle measurement data when turned on again. The telescope of this theodolite provides erect images, with a magnification of 30 times, an effective aperture of 45mm, a resolution of 3″, a field of view of 1°30′, a minimum viewing distance of 1.4m, a stadia constant of 100, a stadia additive constant of 0, and a tube length of 157mm. The angle measurement accuracy is 2″, and the minimum display reading can be selected as 1″ or 5″. The long level vial has a precision of 30″/2mm, and the circular level vial has a precision of 8′/2mm. The instrument measures 165×157×318mm in size and weighs 4.3kg. It can operate within an ambient temperature range of -20℃ to +45℃ and is equipped with rechargeable nickel-hydrogen batteries/AA batteries, which can support continuous operation for up to 10 hours. Moreover, the theodolite features good waterproof and dustproof performance.