Season 10 Episodes13
Cast1

Lynne Adams
Narrator (voice)
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Ranked #11 of 13 in Season 10•−0.1 vs season avg
Sheet steel is rolled, welded and sealed into shipping drums, metal chambers are formed and tuned into police whistles, small-scale components are molded, painted and assembled into miniature train cars, and pressed sections of molten glass are fused into hollow building blocks.

Lynne Adams
Narrator (voice)
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"Steel Shipping Drums, Police Whistles, Miniature Train Cars, Glass Blocks" is episode 12 of How It's Made season 10. It scored 7.6/10 from 20 votes, ranking #11 of 13 episodes this season (season average 7.7). It aired on August 5, 2008.