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我们对民德蔡司厂和我国新添光学仪器厂出品的万能测长仪“电眼”测球直径分别进行了检定,发现蔡司厂的测球直径实际尺寸比它们标注的尺寸小,而新添厂的测球直径实际尺寸
We examined the diameter of the ball of the “goggles” manufactured by Mintex Zeiss plant and our newly added optical instrument factory, and found that the actual size of the ball diameter measured by the ZEISS factory is smaller than the dimensions of their markings. However, The actual size of the ball diameter measurement