pitch line of groove 轧槽中线 ; 孔型中心线
groove with variable pitch [电] 变距槽
Variable Pitch Groove Turbo Engine 可以开发这种微型变螺旋槽涡轮发念头
Pulleys are on the market that permit an adjustment in the width of the groove. The effective pitch diameter of the pulley is thus varied, and moderate changes in the speed ratio can be secured.
带轮运行一定时间后，槽的宽度可以调节，这样带轮的节距是变化的，因此需要进行适当的调整以满足速度比的要求。
It is the difference between theoretical normal pitch and its actual measured value. The major element to influence the pitch errors is the runout of gear flank groove.
推测的法向周节与实际测量值不同。影响周节错误的最主要因素是齿轮侧面有凹槽。
With the theory of kinematics, the universal model of changed Angle and variable pitch spiral groove on any turning surface is researched.
本文应用运动学理论，研究了任意回转体外表面上的变倾角变导程螺旋线的通用模型。
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