perpendicular at midpointとは 意味・読み方・使い方

Perpendicular weir plates 12 are provided, which hold back air foam extinguishant, inside the top part of the pontoon 7 of the floating roof 5, and piping is provided reaching from inside the lower end of the weir plates 12 to the top surface of the roof plate 6, and an independent mechanical emergency cut-off valve working by sensing the earthquake at some midpoint of the piping.例文帳に追加

浮屋根5のポンツーン7上部内側にエアーフォーム泡消火剤を堰き止める垂直な堰板12を設け、該堰板12の下端内側より屋根板6上面に至る配管を設け、該配管の途中に地震を検知して作動する自立機械式の緊急遮断弁を設ける。 - 特許庁