18. a.
Vertical.
b.
Horizontal.
c.
19. a.
7 (can end)
b.
6 (expansion ring)
c.
5 (double seam)
d.
4 (side seam)
e.
3 (body)
f.
2 (bead)
g.
1 (key tongue)
h.
8 (score)
i.
9 (counter sink)
j.
20. a.
Finish.
b.
23. a
25. a.
Shorter retort time.
b.
Shorter distance to the geometric center.
c.
Almost no chemical corrosion of the interior and exterior surfaces.
d.
End of Lesson 1
MD0708
1-29