采用本发明复合纳米改性填料所制备的橡胶密 封制品具有优良的机械性能、耐腐蚀性能和耐黄变性能。
Rubber sealing products prepared by adopting the composite nano modified filler in the invention have excellent mechanical performance, corrosion resistance and yellowing resistance.
黄宗智提出的以“边际报酬”为评判尺度的“过密化”理论 ，是其分析和评判中国小农经济的理论基点。
Philip Huang s "Involutionary Theory" is his theoretical BP which was used to analyze and comment on Chinese small-scale peasant economy.
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