roughing sand
英 [ˈrʌfɪŋ sænd]
美 [ˈrʌfɪŋ sænd]
原砂,未清洗砂
机械
双语例句
- A study on countryside water supply with combined process of roughing filtration and slow sand filtration
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粗滤慢滤组合型乡村净水工艺研究
- Effects of grain size of roughing resin sand on strength
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树脂砂原砂粒度对强度的影响
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