pneumatic

a.气动的

pluperfect, plural, pluralism, pluralist, pluralist (also pluralistic), plurality, plus, plus-fours, plush, plushiness, plushy, Pluto, plutocracy, plutocrat, plutocratic, plutonium, ply, plywood, PM, PMT, pneumatically, pneumonia, PO, po-faced, poach, poacher, POB, pock, pock-marked, pocked, pocket, pocket-book, pocket-knife, pocket-money, pocketful, pod, podginess, podgy, podiatrist, podiatry,