投硬币

投硬币	tóu yìng bì	coin-operated / to insert a coin
投	tóu	to throw (sth in a specific direction: ball, javelin, grenade etc) / to cast (a ballot) / to cast (a glance, a shadow etc) / to put in (money for investment, a coin to operate a slot machine) / to send (a letter, a manuscript etc) / to throw oneself into (a river, a well etc to commit suicide) / to go to; to seek refuge; to place oneself into the hands of / (coll.) to rinse (clothes) in water
硬	yìng	hard; stiff; solid / (fig.) strong; firm / resolutely; uncompromisingly / laboriously; with great difficulty / good (quality); able (person) / (of food) filling; substantial
硬币	yìng bì	coin / CL:枚
币	bì	money / coins / currency / silk