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5ガロンバケツテストで毎分ガロン流量を計算する方法と、流量損失について説明します。
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1 つのゾーンにスプリンクラーをいくつ設置できますか?
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280 Gallons per minute through Downspout pipe and pop-up 3" vs 4" which one flushes debris better?