装配平台平面度及相应用途
时间：2016/2/2 10:02:59
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1.AA级：其平面度(μm)= 1+1.6D2 (D为平台对角线长或直径)，用於高度精密之测定之用，常用於实验室。
2.A级：其平面度为AA级之两倍误差，常用於工具检验室作精密量具之检验之用。
3.B级：其平面度为AA级之四倍误差，常用於工具检验室或在现场检验量具或划线之用。
Assembly
platform flatness and corresponding use
1.AA grade:
its flatness (μm) = 1 + 1.6D2 (D is the diagonal length or diameter of the
platform), used for highly sophisticated measurements, often used in the
laboratory.
2. Class A:
The flatness is twice the error of AA grade, which is often used in the
inspection of precision measuring tools in the tool inspection room.
3. Class B:
The flatness is four times the error of AA level, which is often used in tool
inspection room or in the field to test gage or scribing.
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address: jiaohe development zone, botou city, hebei province
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