Engineering Drawing
These are used to attach parts to a cylinder so they won't turn on it:

Lugs and bearings
Key-seats and bearings
Knurls and keys
Keys and key-ways/key-seats

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Engineering Drawing
Traditional drafters need to be able to create several different line widths because ________.

The line width has to do with how dark it appear in the finished drawing
It makes no difference
They seem to transmit better in a fax machine
Different line widths convey different information

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