Chern invariants of surfaces of general type
Chern invariants of surfaces of general type
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DOI：
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发表时间：
1981
影响因子：
1.8
通讯作者：
U. Persson
中科院分区：
文献类型：
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作者：
U. Persson
每个卡通过一个分支管道与多个气动进料管道互连，该分支管道可以选择性地与任何一个进料管道连通。每个分支管道包括靠近一端的多个开口，每个开口通过滑动挡板相对于进料管道打开或关闭。此外，每个分支管道的上游端通向大气，使得相同的恒定空气压力在通向各种梳理机的所有进料斜槽中占主导地位。
Each card is interconnected to a multiplicity of pneumatic feed ducts via a branch duct which can be selectively placed in communication with any one of the feed ducts. Each branch duct includes a plurality of openings near one end, each of which is opened or closed relative to a feed duct by means of a sliding baffle. In addition, the upstream end of each branch duct is open to the atmosphere so that the same constant air pressure prevails in all of the feed chutes to the various cards.