长度的线纹基准有国家基准米尺、工作基准米尺、一等线纹米尺、二等线纹米尺、基准短标尺及一等和二等短标尺等。线纹尺的主要用途是通过这些线纹基准,将长度的自然基准──光波波长传递至各种被测的线纹量具和工具,实现量值的正确传递,保证线纹量值的准确一致。线纹尺的用途 The length of the baseline line with the national benchmark meter, working standard meter, first-line linear meter, second-line linear meter, standard short rod and first-class and second-class short rod and so on. The main purpose of the thread ruler is to pass these thread reference, the length of the natural reference ─ ─ wavelength of light transmitted to a variety of measured lines and tools to achieve the correct transmission of values ​​to ensure accurate alignment of the amount of thread . The use of line ruler