running water provided by public utility systems after purification and disinfection

a plant or facility where water is treated and supplied to a city

a pen with a reservoir or cartridge that automatically feeds ink to the nib; same as [[钢笔|鋼筆|gang1 bi3]]

(archaic) safety matches; also known as [[洋火|洋火|yang2 huo3]]

natural curls; natural wave in hair

water mains; service pipe; tap-water pipe

To arrive without being invited; to show up unsolicited; to be an uninvited guest.