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At last, the software for upper machine and lower machine is introduced.Chapter 3, on the basis of the experiment on the nano feeding control platform, the mathematic modal of drive parts is established considering that the nano feeding under large feeding force has some open air temperature random disturbance phenomenon which influences the feed precision.

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Early the next morning,we got up and went to the West lake on schedule,there were many middle-aged people or older ones on the bank of it who are taking all kinds of morning exercise,I felt it strongly that the nights there are belong to the youny,for you can see many youny couples walking side- by -side or hand-in- hand along the lake.the air is full of romantic .yet the mornings are much familiar to the older peolpe.

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They ran into the middle of the street to look up at the nursery window; and, yes, it was still shut, but the room was ablaze with light, and most heart-gripping sight of all, they could see in shadow on the curtain three little figures in night attire circling round and round, not on the floor but in the air.

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