propelling pencil

pencil with a lead that can be moved forwards by turning the outer case 自动铅笔.

pronouncement, pronto, pronunciation, proof, proof spirit, proof-read, prop, prop-jet, prop-word, propaganda, propagandist, propagandize, propagandise, propagate, propagation, propagator, propane, propel, propellant (also propellent), propellent, propeller, propensity, proper, proper fraction, proper name (also `proper noun), properly, propertied, property, prophecy, prophesy, prophet, prophetic, prophetically, prophylactic, prophylaxis, propinquity, propitiate, propitiation, propitiatory, propitious, propitiously,