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YI、YIQIDEYONGTUJIXINGHAO

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GENJUQIMICHIKEHUAJINGDUCHAZHIFANWEIFENWEIZFXC-Ⅰ、ZFXC-Ⅱ、ZFXC-ⅢSANGEXINGHAO。

1.    Functions and models

First grade thread metre ruler(also called Genevese ruler) is an accurate scored medal ruler with a reading magnifier and a thermometer. It is often used to survey the distance among the marginal point, the reference point and the coordinate grid during the mapping work, and is also prescribed as the standard ruler to appraise leveling staffs in national leveling regulation, It is also widely used to survey and measure the linear distance and to score the staffs in other specialized departments.

ER、YIQIDEZHUYAOCANSHU

1、YIQIWAIXINGCHICUN：ZHANG1050mm×KUAN38mm×GAO63mm

2、YIQIZHONGLIANG： 3kg

3、MUXIACHICUN：ZHANG1080mm×KUAN74mm×GAO82mm

4、QUANTAOZHONGLIANG：YUE5.5kg

5、MICHIDEFENDUZHANGDU：1020mm

6、MICHIDEFENDUZHI：ERXIEMIANFENBIEWEI1mmHE0.2mm（KEGUDUDAO0.01mm）

7、FANGDAJINGFANGDABEISHU：7×

8、WENDUJIDEFENDUZHI：0.5DU

9、MICHIXIEMIANRENBIANDEBUZHIDU ≤0.1

Ⅱ.The main parameters of the apparatus

1.    Dimension: length1050mm×width38mm×height63mm

2.    Weight:3kg

3.    The wood box size:length1080mm×width74mm×height82mm

4.    The gross weight: about5.5kg

5.    The graduation length of the ruler: 1020mm

6.    The graduation value of the ruler: the two inclined planes are 1mm and 0.2mm(can be appraised to 0.01mm)respectively.

7.    The times enlargement of the magnifier: 7×

8.    The graduation value of the thermometer: 0.5°

9.    The curve of the inclined plane blade of the r