zhè zhǒng / chuāng kuāng / cǎi yòng / lǚ hé jīn / zhì zào / zhòng liàng / qīng / ér qiě / bù róng yì / shēng xiù

这种窗框采用铝合金制造，重量轻而且不容易生锈。

This type of window frame is made of aluminum alloy, which is lightweight and does not rust easily.