GB 50242-2002 第10.2.2条
| **** | Before pipe burial, water-filling tests and flow tests must be carried out; drainage shall be unobstructed, free of blockages, and pipe joints shall be free of leakage. |
| **** | Before pipe burial, water-filling tests and flow tests must be carried out; drainage shall be unobstructed, free of blockages, and pipe joints shall be free of leakage. |
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