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The finer fraction (2 mm) of the samples was finely powdered in an agate mortar.
微细粒级的样品(2毫米)在玛瑙研钵中呈细粉末状。
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Suitable fiber length and volume fraction are pacing factors of improving absorbing property of mortar.
适当的纤维长度和体积掺量是提高砂浆吸波性能的决定性因素；
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