trail.txt.2

完全能够实现功能

!trail file version No. 1301
!Pro/ENGINEER  TM  Wildfire 2.0  (c) 1988-2002 by Wisdom Systems  All Rights Reserved.
< 0 1.159000
< 0 0.939852
< 0 0.888000
< 0 0.838000
< 0 0.838000