A small square piece of cleaned aluminum foil is shaped around a circular mold to make a flat-bottomed, aluminum collection crown into which the sample may be placed.
(A small square piece of cleaned aluminum foil; is shaped; around a circular mold; to make a flat-bottomed, aluminum collection crown) (a flat-bottomed, aluminum collection crown; may be placed; the sample)
A small square piece of cleaned aluminum foil a flat-bottomed, aluminum collection crown
is shaped may be placed
around a circular mold to make a flat-bottomed, aluminum collection crown
the sample