[here,force]
[fig:tubing]
{Tubular Linear Volumetric Capacity}
{\startMPcode
draw (0,0){up} ... (1.25cm, 2mm) ... (2.5cm,0){down} ... (1.25cm, -2mm) ... cycle;
draw (0,0) -- (0,-5cm) dashed evenly;
draw (2.5cm,0) -- (2.5cm,-5cm) dashed evenly;
draw (0,-5cm){up} ... (1.25cm, -4.8cm) ... (2.5cm,-5cm){down} ... (1.25cm, -5.2cm) ... cycle dashed evenly;
draw (-.2cm,0){up} ... (1.25cm, 3.5mm) ... (2.7cm,0){down} ... (1.25cm, -3.5mm) ... cycle;
draw (-.2cm,0) -- (-.2cm,-5cm);
draw (2.7cm,0) -- (2.7cm,-5cm);
draw (-.2cm,-5cm){up} ... (1.25cm, -4.7cm) ... (2.7cm,-5cm){down} dashed evenly;
draw (-.2cm,-5cm){down} ... (1.25cm, -5.3cm) ... (2.7cm,-5cm){up};
fill (0,-2.5cm){up} ... (1.25cm, -2.3cm) ... (2.5cm,-2.5cm){down} ... (1.25cm, -2.7cm) ... cycle withcolor (.6,.6,.6) dashed evenly;
label.top("tubular",(1.26cm,-1.1cm));
label.top("inside area",(1.28cm,-1.6cm));
label.top("($in^2$)",(1.28cm,-2.2cm));
draw (3.25cm,-5cm) -- (3.25cm,0);
drawarrow (3.25cm,-5) -- (3.25cm,0);
drawarrow (3.25cm,0) -- (3.25cm,-5cm);
label.top("tubular length ($in$)",(5.2cm,-2.75cm));
\stopMPcode}