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...hygroscopicity, softness and color fastness is above four levels, and formaldehyde, phosphor, formalin and so on pollutional the residuums all control in examines...
... electrically turned into a plasma which then excites phosphors to emit light. animation movie - the rapid display of a sequence of drawings or...
...: bronze, bell metal, Babbitt metal, die casting alloy, pewter, phosphor bronze, soft solder, and White metal. The most important salt formed...