annularis环状的
annularadj.环状的;有环纹的
annular gain region圆筒形增益区
annular spare parts环形零件
Annular subaperture环形子孔径
annular termination环状末端
annular plate valve环形阀
annular pilfer band环状可撕开带
annular accelerator环形加速器
annular casing pump圆壳式离心泵
annular screw plate环状板牙
annular return duct环形回水管