(25)如图26,用一个直角梯形用trim命令来剪切车体。9 [6 K" F5 H M/ e3 w# h
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图26 用直角梯形来剪切车体0 ^: ?/ s; B% V m7 i
" Y5 I, C2 F9 g# r. W(26)画出如图27所示的3条线,用sweep2命令产生曲面,如图28。4 t* R8 D! O7 E6 L* m9 t# X. G; C