As a resul t, nacre thickness is sometimes just a cosmetic layer t hat can wear thin over time.
所以真珠质的厚度就像脸上化妆品，不久就会磨薄了。
Wear resistant floor is the most economical and practical ground protection measures, but it can only be cast in concrete production, cast-in-place layer thickness requires more than 5cm.
耐磨地坪是目前最经济实用的地面防护措施，但它只能在现浇混凝土上制作，现浇层的厚度需要5 cm以上。
Wear resistant floor is the most economical and practical ground protection measures, but it can only be cast in concrete production, cast-in-place layer thickness requires more than 5cm.
耐磨地坪是目前最经济实用的地面防护措施，但它只能在现浇混凝土上制作，现浇层的厚度需要5 cm以上。
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