Up for a challenge


Hi William
It seems that the diameter of the two cylinder part on the top are missing.
(But you can measure it if you print the doc, or with a software like Scanit)
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Step 1:
Top of the main cylinder is a sphere
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Step 2:
Then, a plane correctly oriented
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Step 3:
One of the cylinder, but i don't find the external diameter (!)
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Step 4:
Use a symmetry
Then, the next part can be done only if you add the inner conical form .
Hope it will be helpful!