petra

同义词释义

1)petra,正负电子串列存储环型加速器2)petra,positron electron tandem ring accelerator,正负电子串列存储环型加速器3)positive/negative,正负4)forward and backward whirling,正、负进动5)Positive and negative space,正负空间6)positive and negative effect,正负效应7)Positive area and negative area method,正负域法8)ratios of positive and negative merit,正负功比9)positive or negative pressure stream,正、负压流10)positive-negative pressure,正、负压力