Overview:The shape and composition of architectural materials can prove vital for various reasons. The I-beam and the triangle brace are highlighted in this episode.
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First Air Date: Jan 14, 1980Last Air date: Nov 18, 1988Season: 7 SeasonEpisode: 223 EpisodeRuntime: 30:14 minutesQuality: HDIMDb: 4.143 / 10 by 7 usersPopularity: 27.4825Language: en
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