中文摘要：

二道沟地点坡积地层中石核的形态和技术分析显示，至少存在三种剥片技术。一是简单锤击剥片，以简单石核、多台面石核为代表二是系统剥片，以漏斗型石核、盘状石核、交互打击石核和扁脸石为代表三为细石器技术，以细石核为代表。在锤击剥片过程中，至少有三种剥片方式存在于二道沟地点的石核上，即单向打片、交互打片和多向打片。

英文摘要：

The Dayao Paleolithic site is located near Dayao village, northeastern Hohhot, Inner Mongolia Autonomous Region, and include eight gullies and some caves. In 2011, the Erdaogou Locality was discovered in the second gully and excavated from June 21 to September 1 in the same year by staff of the Institute of Vertebrate Paleontology and Paleoanthropology and the Inner Mongolia Museum. An excavated area of about 50m： was exposed. This paper examines one aspect of stone technology of the Erdaogou Locality, namely core reduction. An analysis of cores, flakes, flake fragments and tools reveals that there exist three types of flaking technique at the EDG Locality, namely direct hammer percussion, systematic knapping technology and the microblade technology. Direct hard hammer percussion is the principal flaking technique, and three core reduction strategies by direct hammer percussion can be inferred from various cores forms, namely directional flaking, alternate flaking, and multi- directional flaking. These three flaking strategies are guessed to be employed to exploit pebbles with different initial shapes and sizes.