N a spacer element that can be fixed between the camera body and the lens to increase the distance between film and lens and allow closer focus than would be possible without it 近摄接圈 [photog]
This text mainly points out that the extension of the ring power-supply network in the urban medium-voltage power supply is a comparatively reasonable way of power supply with certain advantages.
文章重点提出在城市中压电网中推广环网供电方式是一种较为合理的具有一定优势的供电方式。
As an extension of the Expo Axis, ShangnanRoad connects the largest main entrance and the outer ring road of Shanghai, and is one of the south-north transportation arteries in Pudong.
作为上海世博会世博轴延伸的世博上南路，其连接着世博会最大的主入口与外环线，是浦东南北交通的大动脉之一。
This peper gives two necessary and sufficient conditions for a ring to be a nil MHR-ring. It is obtained that any nil MHR-ring is extension closed.
给出满足主右理想极小条件诣零环的两个充要条件，此类环是扩张闭的。
应用推荐