The merits of polymer are its high strain, good tenacity and easy making. The merits of ceramics are its excellent heat-proof and abrasion-proof.

塑料模具的优点是强度高、韧性好、易于制作，陶瓷模具的优点则是耐热性好、耐用性好。

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My factory productions quartz sand mainly uses in the glass, fire-proof material, smelting ferrosilicon, flux, ceramics, abrasive substance, casting.

我厂生产的石英砂主要用于玻璃，耐火材料，冶炼硅铁，冶金熔剂。

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Everywhere there are stands displaying the latest in blast-proof glass or ceramics, so that vehicle makers can achieve the protection level armies are calling for.

BBC: Nexter Armoured Fighting Vehicle