輜重兵
"Pusser" is Royal Navy slang for a purser, a ship's supply officer, now called a Logistics Officer. Thus the word came to connote "one hundred per cent Service," as in "pusser's issue." "Pusser's issue" applies to anything supplied by the Royal Navy, such as a "pusser's grip", a canvas bag that sailors may use instead of a suitcase (it folds flat and is thus easy to stow on board ship).