填空题

In Sydney’s Galleries Victoria, the mall’s main piazza is covered with a large, flat skylight made of______.

【参考答案】

taughened heat strengthened glass

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填空题

If the taughened glass needs to meet both the security requirement and the desire of containing the glass if it breaks, then______ is applied.

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Since taughened glass can replace shutters in downtown stores, it provides the store with______.