... screened well 过滤井,滤网式井... screened sand 过筛砂 screened feeder 屏蔽馈线 ...
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screened sand sifted sand 过筛砂
Sand size Screened 分砂尺寸
Sand should be screened before you mix it with concrete.
与混凝土混合前，沙子该筛一筛。
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