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Building contractors often install double-glazed windows to prevent thermal energy (heat) from entering or exiting a building
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thanh SonicMaster n=1.54 Using snell law: 1 Sin (60)=1.54 sinta 6s = 34.2° Snell law O2=60 7 - n=1.0 air n=1.0 7 n=1.54. glas

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