发布时间:2025-01-17 06:09:24
落水管插在水缸里会影响排水,特别是当雨下得比较大时。
因为水缸满水后,会减缓落水管下水速度 ,可能造成屋面雨水排水不及时,屋面积水。
18米宽的彩钢棚用多大钢管或方钢耐用省钱做彩钢棚架子房架子形或半圆形那种好乘载大
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