included angle of thread 螺纹角 ; 螺纹夹角
helix angle of thread 螺纹螺旋角
half-angle of thread 螺纹半角
angle of screw thread 螺纹截形角
half of thread angle 牙型半角
angle e of thread 螺纹牙形角
This paper describes a new method and device for measuring helical line, pitch diameter, taper and half-angle of thread of petroleum thread gauges.
本文介绍一种测量石油螺纹量规的螺旋线、中径、锥度和牙形半角的新方法及装置。
The equations for thread taper, thread pitch, thread angle and height of thread can be derived on the base of fitted lines, which are accurate enough to meet the needs of industrial measurement.
该方法可测量螺纹的锥度、螺距、螺纹夹角和螺纹高度，测量精度可以满足工业测量要求。
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