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The hydrant or valve pit ought to be opened and checked that it is clean instead of stuffed with any dirt or leaking h2o. In case the pit is full of water, it should be emptied and cleaned.此篇知識可能不適用於所有同類型/系列的產品,部分畫面選項或操作步驟可能會因為軟體版本的不同而有差異。Your Facebook