蔬菜肉末粥专利名称：Screw extracting device 发明人：Douglas S. Marling
钢结构施工方案申请号：US05/929899
申请日：19780801
信乐团歌曲公开号：US04204308A
公开日：
三大银行是哪三个19800527
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摘要：A screw extracting device is provided for removing screws which cannot be removed with an ordinary screwdriver. The device compris an elongate rod, a handle located at one end of the rod, a plurality of gripping fingers located at the other end of the rod for gripping the screw to be extracted a sleeve, threaded for movement along the rod, for controlling contraction and expansion of said gripping fingers in accordance with the longitudinal position of said sleeve along the rod so as to provide gripping and relea of the screw head. The fingers each include a tapered tip portion which permits the fingers to be driven into the surface surrounding the head of the screw to be extracted and gripping ridges or the like for providing firm gripping of the screw head. A method of using the device is also enclod.火大吃什么降火
申请人：MARLING, DOUGLAS S
代理机构：Larson, Taylor and Hinds
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