الوصف

wooden leveling staff The principle technical specifications: The difference between real length and nominal length per meter: ≤±0.3mm; the difference of average real length between the scale space in meter: ≤±0.3mm; the difference of average real length between the scale space in decimeter: ≤±0.3mm; The accumulate allowance of the whole three meters: ≤±0.9mm; The null point difference of a pair of staffs: ≤±0.2mm; The degree of curve of staff: ≤±4mm Notes: our company can supply special wooden leveling staffs.