<正> We collected a sample of massicot in a warm spring sediment in Chongqing, Sichuan, in March 1954. The massicot was ......

采用热还原法和直接沉淀法分别制备纳米级铜粉与微米级β—PbO粉，考察其在合成润滑油PAO10中的摩擦学性能，并对摩擦磨损机制进行讨论......