单词	蠣房之子
释义	同Cultch
随便看	pitch chord ratio pitch circle pitch circle diameter pitch circle diameter {= pcd} pitch circle diameter {= pcd} pitch circle of worm pitch circle of wormwheel pitch circumference pitch coal pitch coke pitch cone pitch cone angle pitch-cone angle pitch cone radius pitch connection moment pitch contour pitch control pitch-control box pitch control link pitch control rod pitch curve pitch cylinder pitch cylinder of worm pitch cylinder of wormwheel pitch damping