The extraction of indigo naturalis powder with different diameters was studied. 研究提取不同粒徑青黛的溶出情況。
The experimental research on the apparent conductivity of pearlite in different particle sizes and different vacuity is reported. 實驗測定了不同粒徑珠光砂在不同真空度下的表觀導熱係數。
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