测量范围货号精度a/b 0 - 25mm 389-251 ±4μm 160/27.5mm 389-261S-F ±4μm 160/27.5mm 389-271S-S ±4μm 160/27.5mm 389-513 ±5μm 330/35mm 25 - 50mm 389-252 ±4μm 165/27.5mm 389-262S-F ±4μm 165/27.5mm 389-272S-S ±4μm 165/27.5mm