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设计了两种测量非完整圆弧半径的新型专用量具。实践证明 ,使用这两种量具可直接测量非完整圆弧半径 ,量具操作简单 ,经济实用
Two new types of gauges are designed to measure the radius of a non-complete arc. Practice has proved that the use of these two gauges can directly measure the radius of non-complete arc, measuring tool is simple, economical and practical