In a typical hardwood flooring installation, the tongues of the boards must all face in the same direction. After nailing the tongues of one course, the grooves of. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi. Nov;13(6) [Wound repair with single or double reverse tongue-shaped skin flap]. [Article in Chinese]. Tongue thrust is the common name of orofacial muscular imbalance, a human behavioral If the tongue is allowed to continue its pushing action against the teeth, it will continue to push the teeth forward and reverse the orthodontic work.