Notes on motivic cohomology
Notes on motivic cohomology
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关于动机上同调的注释
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
C. Weibel
中科院分区：
文献类型：
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作者：
C. Mazza;V. Voevodsky;C. Weibel
一种用于与骨髓活检针结合使用的垫，其适于滑过所述针的近端以提供扩大的表面，用于在使用者的手掌上分布所述压力。所述垫包括通常呈盘状的手掌接合表面以及用于可释放附着于所述活检针的针包络套。通过套筒的壁形成孔，以提供套筒内部与大气之间的通信，从而避免当垫件安装在针上时垫件与针的管腔之间的空气转移。
A pad for use in combination with a bone marrow biopsy needle which is adapted to be slipped over the proximal end of the needle to provide an enlarged surface for distributing the pressure across the palm of the user. The pad includes a generally disc-shaped palm engaging surface along with a needle enveloping sleeve for releasable attachment to the biopsy needle. A bore is formed through the wall of the sleeve to provide communication between the interior of the sleeve and the atmosphere, thereby avoiding transfer of air between the pad element and the lumen of the needle when the pad element is mounted on the needle.