快三在线
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SH-S型数字式电秒表 ★ 测量范围；0.00001s—99999.9s ★ 时标准确度；优于5X10-5 ★ 显示方式：＜5×10－5×量程+1个字 ★ 工作电源:AC22V+10%或DC9V
