The Basic Principles Of ome88
Hydrant outlet and valve to the underground sort hydrant and valves to the stand put up variety hydrant really should be Positioned as in close proximity to the bottom amount as feasible. The best of your outlet or spindle of your valve need to be in a depth not exceeding 0.three m.請注意:務必確保已選取的區域來自正確的螢幕截