标准摘要
[中文适用范围]： Lya 降低了由电动机直接驱动的切削金属机床的速度（每分钟转数或冲程数）和进给量（以毫米或英寸为单位，每分钟、每转或每冲程）。 不适用于连续速度变化、螺纹成型进给等的机器。 [外文原描述]： Lya down the speeds (number of revolutions or strokes per minute) and the feeds (in millimetres or in inches, per minute, per revolution, or per stroke) of machine tools working by removal of metal an driven directly by an electrical motor. Is not applicable to machines with continuous speed variations, feeds for thread forming, etc.
英文名称Machine tools — Speeds and feeds