from front view, create this profile curve (fig 1), and move it to -0.95 of z axis. in this case, i use a measurement of around 5.7 cm (fig 2). use the create > measure tools > distance tool to check the distance.

在前视窗里创建轮廓曲线 (fig 1), 并在 z 轴方向上移动约 -0.95. 在这个教程里，我的尺寸约为 5.7 cm(fig 2). 你可以使用 create > measure tools > distance tool 来检查你的尺寸 .

fig 1


fig 2

from side view, duplicate this curve and move the new curve to 0.951 of z axis (fig 3), then tweak this new curve's cvs into this shape (fig 4), so it looks smaller than the original.

在侧视图复制曲线，并在 z 轴方向上移动约为 0.951(fig 3), 然后将新复制的曲线移动各 cv 点使其形状像 (fig 4) 所示，可以看出它比原来的曲线轮廓要小。

fig 3


fig 4

next, select the 2 curves and go to surface > loft (fig 5). ok. next create a nurbs cylinder with radius 2, height ratio 3, sections 20, spans 12 (fig 6).

接下来，选择这两条曲线并 surface > loft (fig 5). ok. 创建一个 nurbs 圆柱体，半径为 2 ，高为 3 ， sections 为 20,span 为 12(fig 6).

fig 5


fig 6

now from side view, rescale the z value to 0.216 (fig7). next...click the select by component type button , go to front view and select these center cvs (see fig 8).

回到侧视窗，将圆柱体的 z 轴方向缩小到 0.216(fig 7). 接下来选择中间的一些 cv 点 (fig 8).

fig 7


fig 8

now move the selected cvs to 1.433 of z axis (fig 9), you can see the cvs' axis value in the cvs panel (right side).

将它们在 z 轴方向上移动约 1.433 的距离，你可以在右边通道栏里看到数值 .

fig 9

next, select your lofted object, shift-select the cylinder, go to edit nurbs > surface fillet > circular fillet > option box and apply these settings (fig 10). note : use 0.0010 for positional tolerance for better fillet tolerance, hit fillet, then you'll have this figure (fig 11).

接下来，选择你 loft 成的曲面，按 shift 键选择圆柱体，到 edit nurbs > surface fillet > circular fillet > option box 选项框里运用这个设置 (fig 10).
记住 : 使用 0.0010 的数值给 positional tolerance ，这样你就可以得到 (fig 11).

fig 10


fig 11

next, select the cylinder, go to edit nurbs > trim tools , select one of the white trim areas (fig 12), rotate your camera view to back side, and select back center area (fig 13) then hit enter.

接下来，选择圆柱体，到 edit nurbs > trim tools, 选择要保留的曲面区域，如 (fig 12)(fig 13) 所示，然后 trim 它。

fig 12


fig 13

next, select the lofted object, go to edit nurbs > trim tools , select one of center top areas (fig 14) then hit enter (fig 15).

选择 loft 出来的曲面，到 edit nurbs > trim tools, 选择要保留的曲面区域，如 (fig 14)(fig 15) 所示，然后 trim 它。

fig 14


fig 15

next from front view, create a nurbs torus with radius 3.8, sections 22, height ratio 0.08, rotate it to 90° of x axis (fig 16), then select these 4 cvs and rescale them a little bit towards the center (use left manipulator to rescale them) (fig 17).

回到前视窗，创建一个 nurbs 圆环，半径为 3.8,section 为 22 ， hight ratio 为 0.08, 并在 x 轴方向上旋转 90 度 (fig 16), 选择这 4 个 cv 点并将它们向中心方向拉伸一点 .(fig 17)

fig 16


fig 17

next, create a nurbs circle with 18 spans, rotate it to around -41.676° of z axis and rescale to 0.238 of z scale, translate it to -2.484 of x axis and -2.736 of y axis (fig 18). next, you need to duplicate and rotate this curve several times towards the top left side and tweak some cvs (see fig 19).

接下平，创建一个 nurbs 圆曲线， span 为 18, 并在 z 轴方向上旋转 -41.676 度，并将 z 轴方向缩小到 0.238, 在 x 轴方向上移动到 -2.484 ， y 轴移动到 -2.736(fig 18). 接下来你需要复制一些曲线并旋转移动到 (fig 19) ，适当移动它们的一些 cv 点。

fig 18


fig 19

next, select all of these curves sequentially and go to surface > loft (fig 20). next create a nurbs cylinder with 16 sections, 4 spans, height ratio 2, rotate it to 90 of x axis, scale it 0.462 of x axis, rotate it to around 30.818° of z axis, and then rescale one row of the outer cvs. rescale them very small until it looks like they are touching each other (fig21).

按顺序选择这些曲线并 surface > loft (fig 20). 接下来创建一个 nurbs 圆柱体， sections 16 ， 4 spans, height ratio 2, 并在 x 轴方向上旋转 90 度 ,x 轴方向上缩小到 0.462, 在 y 轴方向上旋转 30.818 度，并拉伸一些 cv 点到看上去都接触到一起。

fig 20


fig 21