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目前,各施工单位施工放样时所用的钢尺大多数是30米和50米长的。30米和50米钢尺报废后,大部分是15米以内尺段刻划不清楚,而15米以后的尺
At present, most of the steel scales used by each construction unit for stakeout are 30 meters and 50 meters long. After the scrapping of the 30-meter and 50-meter steel rulers, most of them are not clearly scribed in a ruler within 15 meters, and the ruler is 15 meters away.