SK，具有基部的直角标尺，带有基部的Scoya，相当于JIS 1级，硬化，500mm 钢正方AA类型（硬化）500mm AA-F500

Long piece total length (mm): 500
Long piece width (mm): 46
Long piece thickness (mm): 5
Bottom total length (mm): 300
Short piece width (mm): 45
Short piece thickness (mm): 35
Short piece thickness (mm): 35
Square angle (mm): ±0.035
Hardening hardness (HV): 450 or more
Pole length (mm): 500
Base length (mm): 300
Width (mm): 46
Base width (mm): 5
Base thickness (mm): 35
Accuracy: Squareness (mm): ±0.035
Shape: With base名义尺寸（mm）：500

主体：机械结构的碳钢

4300G

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