pitch reference cylinder基准节圆柱面
Pitch oil cylinder俯仰油缸
hobbing pitch cylinder滚切节圆柱面链轮
pitch cylinder of worm[机] 蜗杆节圆柱面
backstop pitch cylinder托架俯仰范围
pitch cylinder of wormwheel[机] 蜗轮节圆柱面
large cylinder opener pitch streak大脂斑纹
large cylinder opener pitch pocket大脂囊
N（名词） an imaginary cylinder passing through, and coaxial with, the threads of a screw so that its intersection with opposite flanks of any groove is equal to half the thread pitch 节圆柱