Reinforced pipe has steel imbedded in the concrete to give added structural strength.Circular pipe is manufactured in diameter from to 3600 mm, and in laying lengths that range from 1m to 4m.
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美
释义
基于10年重现期设计的雨水系统荣的尺寸假定每十年内的一次暴雨会超过系统的输送能力。
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