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量块是各种长度测量工具的必备计量工具,其精度非常高,可用来计量千分尺、卡尺等。为了计量方便,每个量块上都刻有唯一的序列号和量块的尺寸信息。量块组按1/16” 和0.1”(英制)的长度递增,以0.25,0.5,以及1mm的长度(公制)递增。长度公差依照ASME 0级标准。本套量块组依次序放置在木制盒子中保存。
| English Set | Metric Set | |
| Face Width | 0.3" and less: 1.181" | 10mm and less: 30mm |
| Over 0.3": 1.378" | Over 10mm: 35mm | |
| Face Depth | 0.354" | 9mm |
| Length Tolerance | 4µin | 0.10µm |
| Length Deviation | 0.0625" to 0.3": ±5µin | 10mm and less: ±0.12µm |
| 0.5" to 1": ±6µin | Over 10mm: ±0.14µm | |
| 2": ±8µin | ||
| Sizes Included | 0.0625, 0.100, 0.125, 0.200, 0.250, 0.300, 0.500, 1, 2" | 1.00, 1.25, 1.50, 2, 3, 5, 10, 15, 20, 25mm |