Well LINKS
A water well is an excavation or structure created in the ground ??by digging, driving, boring or drilling to access water in underground aquifers. The well water is drawn via an electric submersible pump or a mechanical pump (eg from a water-pumping windmill). It can also be drawn up using containers, such as buckets, that are raised mechanically or by hand. Although not essential, a storage tank with a pressure of 40-60 psi is usually added to the system (after the pump), so the pump does not need to operate constantly.[1][2] To reduce the electricity required to pump up the water, often, a cistern is also added along with a small second pump (see schematic below). Wells can vary greatly in depth, water volume and water quality. Well water typically contains more minerals in solution than surface water and may require treatment to soften the water by removing minerals such as arsenic, iron and manganese.
From Wikipedia
＜NEWS＞
サイト解説文章 ... ペットの健康を考えるP-WELLは、 ペットネスクラブの企画・運営と厳選された"良質"な商品の販売を行っています。 この部分はインラインフレームを使用しています。 Copyright(C)2004.P-WELL Planning ...
メニュー、スタッフ紹介等。
＜LINKS＞
お見合い ネット 株 犬 病気 顎関節症 子犬 二の腕ダイエット 円高 湿疹 角質 包茎 治療 トルコリラ