The lengths of the links of four-bar linkage ABCD comply with the conditions: A͞B=D͞C, A͞D=2.2A͞B, B͞C=0.9A͞B and B͞E=C͞E=1.4A͞B. 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, parallel to AD.
$659$LW,GI$