The lengths of the links of four-bar linkage ABCD comply with the conditions: B͞C=1.92A͞B, D͞C=2A͞B, C͞E=2.84A͞B, E͞B=4.77A͞B, A͞D=2.3A͞B and D͞F=3.08A͞B. When link 1 turns about fixed axis A, point E of link 2 describes a path of which a certain portion approximates straight line q-q passing through point F.
$674$LW,GI$