前言在美国,大约有800万职工承受着职业性与工业上的振动,其中有卡车与公共汽车司机、重型设备与农用车辆的司机、链锯操作者、电动工具与气动工具的使用者。人体振动大致可分为两类: 1.“整体振动”即通过某些支承结构(如在重型设备车辆、农用车辆、卡车或公共汽车上的车座)传输到整个身体上的振动。 2.“手臂”或“局部”的振动,由振动链锯、电动或气动工具等施加在人体特定部位 Foreword In the United States, approximately 8 million workers are exposed to occupational and industrial vibrations, including truck and bus drivers, drivers of heavy equipment and agricultural vehicles, chain saw operators, and users of power tools and pneumatic tools. Human body vibrations can be roughly classified into two categories: 1. “Integral vibration” refers to the vibration transmitted to the entire body through some supporting structures (such as seats on heavy equipment vehicles, agricultural vehicles, trucks or buses). 2. “arm” or “partial” vibrations applied to specific parts of the body by vibrating chain saws, electric or pneumatic tools, etc.