A.sec B.inf C.prt D.asm
A.d1=2*WIDTH B.d2=tan60 C.d3=W*50% D.d4=50*trajpar+50
A.3-D實(shí)體建模 B.基于特征 C.參數(shù)化設(shè)計(jì) D.統(tǒng)一數(shù)據(jù)庫