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Hydrant outlet and valve with the underground style hydrant and valves with the stand write-up style hydrant should be Found as around the ground level as you possibly can. The very best in the outlet or spindle in the valve needs to be in a depth not exceeding 0.3 m.請注意:務必確保已選取的區域來自正確的螢幕截圖(螢幕內�