THE STRUCTURE OF QUASIHOMOGENEOUS SINGULARITIES
THE STRUCTURE OF QUASIHOMOGENEOUS SINGULARITIES
复制标题
准齐次奇点的结构
DOI：
10.1090/pspum/040.2/713284
复制
发表时间：
1973
期刊：
影响因子：
--
通讯作者：
P. Wagreich
中科院分区：
文献类型：
--
作者：
P. Wagreich
一种用于在路缘中提供排水孔的钻孔设备，包括空心钻，该空心钻被安装成沿保持在钻架和与路缘成钩挂关系定位的钩挂构件之间的水平柱沿着纵向移动。当一对链条在钩构件和钻架之间延伸以保持钻架与路缘石牢固接触时，水平柱被压缩地紧固。
A drill apparatus for providing a drain hole in curbing comprises a core drill mounted for longitudinal movement along a horizontal post held between a drill frame and a hooking member positioned in hooking relation with the curb. The horizontal post is tightened in compression while a pair of chains extend between the hooking member and the drill frame for holding the frame in firm contact with the curbing.