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The earliest Chinese ancient glasses before the West Han Dynasty (200 BC) from different regions are studied. The glass ......
Continuous annular chromatography(CAC) is a separation process for multicomponent liquid mixtures. The performance of th......
一把旧钥匙上有一句意义深远的铭文——如果休息,我就会生锈。对那些因懒散而烦恼的人来说,这是至理名言。甚至最勤勉的人也可以以......
For the purpose of solving the problem that too large pole tip recession (PTR) is produced in magnetic rigid disk beads ......
Deeply penetrated welds can be produced with high-power-density lasers.Thus the factors affecting laser weld penetration......
In lost foam casting (LFC), the distribution of polymer beads during the bead filling process is not uniform, and the co......
当老妇人祈祷的时候,牧羊少年为什么会感到害怕呢?The old woman led the boy to a room at the back of her house.It was separa......
