Point A of connecting rod 2 of the four-bar linkage ECDF describes connecting-rod curve a-a. Slider 4 moves alongh the slot of slotted link 5 whic rotates about fixed axis B. Slider 4 is connected by turning pair A to connecting rod 2. During one revolution of crank 1, slotted link 5 makes one full revolution with a short dwell in the position when point A of connecting rod 2 passes through point A' of its path a-a.
$1341$LG,D$