1·This paper mainly focuses on the fluctuation of velocity and torque of the electromotor because of the variational load in the pumping unit equipment.
摘要抽油机中载荷变化大，易引起电动机转速和转矩的波动。
2·Objective To explore the variational rule on trachea resistance of infants with bronchiolitis by detecting tidal breathing flow volume curves of 240 cases of infants with bronchiolitis.
目的通过对240例毛细支气管炎患儿的潮气流速容量曲线的测定，以探讨毛细支气管炎患儿气道阻力的变化规律。
3·Results show that centrifugal field has an important influence on the filling process and melt fills the mould with variational cross section and inclined Angle.
结果表明，离心力场的施加对于充型过程有重要影响，熔体以变化的截面面积和倾角填充铸型。
4·The given charts of transfer coefficients do good on realizing their variational law.
所求取的传递系数曲线对认识其变化规律有所裨益。
5·It has different weight to different the human body. This require that seat have corresponding variational parameters.
因为对于不同的人体有不同的体重，这就要求座椅系统也应该有与之相应变化的参数值。