TQC VF2378 铅笔硬度测试工具

TQC Pencil Hardness Test according Wolff Wilborn (750g) Complies with: ISO 15184, ASTM D3363, JIS K-5600, ECCA-T4-1, BS 3900-E19, SNV 37113, SIS 184187, NEN 5350, MIL C 27 227 Calibration Certificate: included