Dust-free workshop refers to the space must be within the scope of the particles in the air, bacteria and other harmful air pollutants sweep, and the indoor temperature, cleanliness, interior pressure, air velocity and air flow distribution, noise, vibration and lighting, static control within the scope of a certain need, and the special planning of the room. 

　　亦便是不管外在之空气条件怎么变化，其室内均能俱有维持原先所设定需求之洁净度、温湿度及压力等性能之特性。