Definition of niggling for English Language Learners. : causing you to feel a slight pain or to be worried or annoyed for a long time.
What is PPAP? The Production Part Approval Process (PPAP) is a standardized process in the automotive and aerospace industries that helps manufacturers and suppliers communicate and approve production designs and processes before, during, and after manufacture.
Continuous positive airway pressure, better known as CPAP, is a common type of therapy for obstructive sleep apnea (OSA). Itâs also used to treat COPD and overlap syndrome, a term used when a person has OSA and COPD, concurrently. How Does the CPAP Machine Deliver Air and Oxygen?