卧式铣镗床平旋盘回转轴线对Y轴垂直度要求的讨论
와식선당상평선반회전축선대Y축수직도요구적토론
Discussion on the Squarenness Requirements of Rotary Axes to Y Axle of Horizontal Turret of Boring and Milling Machines with Horizontal Spindle
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