锥台圆锥展开公式
圆台展开
H200H×H40000
D1(大)720(D1-D2)/230
D2(小)660[(D1-D2)/2]×[(D1-D2)/2]900
H×H + [(D1-D2)/2]×[(D1-D2)/2]4090040900 L202.2374842D1-D260
R12426.84981D1/(D1-D2)12
R22224.612326D2/(D1-D2)11
α0.932050554圆周率 3.141592654
W2181.0α角度值53.40256305
B439.5α/20.466025277
sina(α/2)0.44933898
cos(α/2)0.893361338
h1258.796016
封头下料
D中径4028
H直断50
展开圆直径4893.32
外径壁厚内径密度比重
3.1415938167.930.0001744
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