31:15 duration 31 minutes 15 seconds
AMM 3600 Chapter 7 Evaluating Material for…
AMM 3600 Chapter 7 Evaluating Material for Comfort, Safety, and Health
32:58 duration 32 minutes 58 seconds
AMM 3600 Chapter 8 Evaluating Colorfastness,…
AMM 3600 Chapter 8 Evaluating Colorfastness, Care, Appearance Retention, Weather