美国Allen Gauge螺纹单项仪

快速、准确测量各种螺纹中径，螺距，牙高，紧密距
型号有：
Buttress Gauges, 
Thread Height Gauges, 
Coupling Gauges, Lead Gauges, 
Wall Gauges, Internal Taper Gauges, 
External Taper Gauges, 
Specialized Gauges, Ovality Gauges, 
Lead Setting Standards, 
Contact Points, 
Pit Depth Gauges, 
Replacement Indicators
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