性能参数/ 3mm钢球测针L材料货号A7.3硬质合金头901312M2.5*0.45 901454＃2.5*0.45 钢900030M2.5*0.45 塑料901994＃4-48UNF 902018M2.5*0.45 红宝石120047M2.5*0.458.3*硬质合金头902119M2.5*0.45钢900986M2.5*0.4515硬质合金头120049M2.5*0.45红宝石120051M2.5*0.4520硬质合金头137391M2.5*0.45红宝石137392M2.5*0.4525硬质合金头120053M2.5*0.45红宝石120055M2.5*0.45 性能参数/ 针型测针(硬质合金头)DNL货号A0.452.510120066M2.5*0.4512.510120065M2.5*0.451.51320120064M2.5*0.452815137257M2.5*0.45