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。......