于友
于友-
没错，免费的啤酒非常有助于维系友�
Yes , free beer is a terrific way to maintain friendships .
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球拍弹性非常好、量超轻，适用于小球友们日常拉球训练和网前拦截；
Good elasticity , super light in weight , which is conformable for juniors daily practicing and holding up before net ;
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介绍了一种适用于阜新艾友矿动力商品煤的快速测定灰分方法，可在指导该矿选煤生产或动力商品煤灰分检查中起参考作用。
A kind of the quick determination of ash yield of commercial coal in Aiyou Mine , which can be a reference to coal preparation or the determination of ash yield , is introduced in the paper .