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Observations were made on young nursery plants and apple orchards to record the coccinellid predators of Aphis pomi De G......
作者首次将可靠性设计方法引入优化设计之中用于2K-H「1」渐开线齿轮行星传动的设计,以形成更完善的行星齿轮传动的设计方法。......