George showed me to the guestroom which, he said, was rarely used.乔治带我去了客房, 他说, 那很少有人用.Please make the guestroom ready for our visitors.请为我们的客人们准备好房间.Sweep the floor in the guestroom.把客房的地打扫一下....
The curve - edged hobbing cutter is used in producing rectangular wing sanitary napkin.曲线刃滚切刀是用来加工护翼卫生巾的专用刀具.A concise mathematical model for hobbing non - circular gear is set up.推导非圆齿轮滚切加工的最简数学模型并作图形仿真验证.This paper pre...