1、The pin gauges are used to measure the hole distance, the pitch diameter of the thread, etc.
針規(guī)適用于機械加工中孔徑、孔距、內螺紋小徑的測量，特別適于彎曲槽寬及模具尺寸的測量。

2、There are many ways to measure base-level pitch diameter of cone-shaped thread.
檢測圓錐管螺紋基面中徑的方法有很多，但測量過程復雜。

3、Pitch diameter is the diameter of the pitch circle.
節(jié)圓直徑(D)：節(jié)圓直徑是節(jié)圓所在圓的直徑。

pitch diameter翻譯