gear tooth gauge 齿轮规 ; 轮齿规 ; 齿距规

tangent gear tooth gauge 正切齿厚规

vernier gear tooth gauge 游标齿厚尺 ; 游标齿厚规

Involute Gear Tooth Gauge 齿轮规

tooth pitch gauge 齿距量轨

gear tooth vernier gauge 游摽齿形规

gear tooth depth gauge 齿高量规

gauge cutters heel tooth notch 边齿三角缺口