common vent pipe 共用通气管
Reinforced concrete and steel structures. Re-use of existing and recycled materials from site. Steel sunscreen louvres and raw common brickworks, concrete vent-blocks and off-form concrete.
加强钢混结构，原址回收材料的再利用。钢制防晒百叶窗和普通砖结构，水泥空心砖和低标号水泥。
The conical vent system shows significantly less distortion and lower air noise at low frequencies than common circular vent openings.
锥形排气系统显示，在低频率大大减少失真，降低空气噪音比普通圆形通风口。
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