differential ring gear 差速器环齿轮

u-differential ring u微分环

differential ring laser gyro 四频激光陀螺

differential busbar ring 差动式汇流环

four-frequency differential ring laser gyroscope 四频差动激光陀螺

differential polynomial ring [数] 微分多项式环

differential extension ring [数] 微分扩张环

differential of ring 环的微分

ring of differential operators 微分算子环