前言日趋严峻的犯罪态势和各类刑事案件的发生,需要警察迅速、有效地加以遏制,并以最小的代价及时侦破。而今,警察面临的执法环境日益错综复杂,各种突发性、对抗性、危难性等案件对警察的处置能力提出了更高、更新、更严峻的挑战。根据警务需要,警察要有适应在各种地形、地貌、人类建筑物中及大型交通工具中作战的能力。警察在执法实践中会遇见许多难以进入或发动攻击的空间,这就 Foreword The increasingly serious crime situation and the occurrence of various types of criminal cases require the police to quickly and effectively contain and promptly crack down with the least cost. Nowadays, the law enforcement environment confronted by the police is increasingly complicated. Various cases of suddenness, confrontation and duress have raised higher, newer and more serious challenges to the handling ability of the police. According to police needs, the police should be able to adapt to the various terrain, landform, human buildings and large vehicles in combat capabilities. In the law enforcement practice, the police will encounter many difficult to enter or attack space, which