natural building sand

基本解釋

Natural resources as mineral water, clay, swell soil, peaty soil and building sand are also quite rich in amount.
鑛泉水、粘土、膨潤(rùn)土、泥炭土、建築用砂等資源也都十分豐富。
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The colours inside and on the outside of the building refer to the local natural colours of grass , sand and water.
內(nèi)部顔色和建築物的外部指的是草，沙子和水的地方自然色彩。
Radon from building materials such as granite, brick sand, cement and gypsum and the like, in particular, contain elements of natural stone and easy to release radon.
氡主要來(lái)自建築材料，如花崗巖、甎砂、水泥及石膏之類，特別是含有放射性元素的天然石材，易釋放出氡。