Lead is a silvery white metal (tin compared to that lead slightly light blue), very soft, can use nail scratches on its surface. Of a program of lead on paper, will leave a gangster Road. In ancient times, people have used lead as a pen. "Pencil," the name is from here to. Lead is heavy, a cubic meter of lead weighing 11.3 tons, the ancient European alchemists who would use rotating house slow Saturn to represent it, writing "h". Shot put so heavy, that is to do with the lead. Bullet bullet often filling a lead, because if too light, when in the forward direction by the wind effects will change. Melting point of lead is very low, as 327 ℃, briquettes on the stove, the lead will melt into water.
more about:buy lead
没有评论:
发表评论