ventilating pipe
常見例句
- The invention provides a ventilating and air-discharging pipe with low cost, light body, thin wall, and easy-cutting and ideal ventilation effect.
本 發(fā)明提供一種成本低、體輕、壁薄、易于切割，且通風(fēng)效果理想的通風(fēng)排煙管 道。
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