Traditional hourly rain gauges and automatic weather stations rarely measure solid precipitation, except for those stati......

Polycyclic aromatic hydrocarbons (PAHs) were measured in precipitation from March to August 2005 in Guangzhou, South Chi......

工业纯铁（厚度为1 mm）经580℃气体渗氮4 h 后进行不同方式（油淬，炉冷）的冷却，然后对油淬的试样进行自然时效和100～220℃的人工时效。采用 ......