High-Voltage Power Amplifier功率放大器 Gas Sampling Bags样品袋 MWJ65I3S-280-STDX-STDX-X千斤顶 ..
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什么将在上午的天气呢？分别取出上面的轻矿物和下面的重矿物，用酒精冲洗干净后烘干、称重，放入样品袋中备用。
Above, remove the light minerals and the heavy minerals, rinse with alcohol after drying, weighing, place the sample in the bag. If you find it you call her at.
他用小丝袋寄送样品。
然后人们把垃圾袋打开，把垃圾进行不同材料的分类，这样能给出学校食物所产生的有代表性的垃圾样品。
A selection of bags were then opened and sorted into different material types, to give a representative sample of the type of waste from food that the school produces.
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