TSL | Taiwan Sing Language Gleaning

With one hand, extend the thumb while keeping the remaining four fingers closed together. Face the palm to the opposite side with your fingers pointing out to indicate a rectangular shape of a car. With your other hand, extend your index finger and middle finger together while keeping the remaining three fingers closed. Face the two palms together and circle the hand with the extended index finger and middle finger along the open palm, imitating the motions of a piston.