The integrated digital display system is capable for oil and dustresistance.
集合式数字显示系统，具有防油和防尘能力。
2
The utility model has the advantages of high filtration accuracy, simple structure, low cost and dustresistance, which can be widely used on various vehicles.
本实用新型具有过滤精度高、结构简单、成本低、不易沾尘的优点，可广泛使用在各种车辆上。
3
The main factors: the dustresistance, the concentration of dust, particles of dust, gas composition, temperature, humidity, air leakage, such as the collecting.