Within the family, small diameter pipes, but also low pressure, see flange connection.
在家庭内，管道直径小，而且是低压，看不见法兰连接。
Vibrating in the wind, the bristles create some drag. But they also reduce the wing's slipstream, an area of low-pressure turbulence that pulls back on the wing, and hence reduce drag.
风中振动时，刷毛会产生反作用力，但同时它也可以减少机翼滑流，产生一个低气压乱流，机翼上形成回力，因而减小阻力。
The new type dryer is characterized not only by simple and light structure, low pressure drop and uniform drying, but also by obvious energy saving.
与原有干燥机相比，其具有结构简单、质量轻、床层压降小、干燥均匀等优点，而且节能优势明显。
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