Project line vertically up to intersect with the valve characteristic curve and from this point project line horizontally across to the left of the chart and record the percentage of maximum flow rate 畫出垂直向上的線與閥門特性曲線相交,從這個(gè)點(diǎn)畫水平線穿過圖表左側(cè),記錄最大流量的百分比。