The findings prove that the best protection effects are found in epoxy re sin primer, and its combination of polyurethane top paint.

研究结果表明：环氧底漆和环氧底漆与聚氨酯面漆的组合防护效果最好。

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Twenty-five years ago Santa Clara University Professors Jim Kouzes and Barry Posner wrote The Leadership Challenge, a primer on how to make extraordinary things happen in organizations by helping leaders perform their personal best.

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