青云翻译

Angle measurements can be divided into direct measurement and indirect measurement, indirect measurement is divided into relative and absolute measurement of measurement. Angle relative to the use of measurement tools can be divided into a measurement of the angle with the angle gauge block, 2 with

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The angle survey separable direct survey and the indirect survey, the indirect survey divides into the relative measurement and surveys absolutely.The angle relative measurement use tool may divide into 1 to use the angle gage block survey angle, 2 to use the multi-surface bank or ridge between fiel

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