[经] multiple investment sinking fund

duō zhǒng tóu zī cháng zhài jī jīn ㄉㄨㄛ ㄓㄨㄥˇ ㄊㄡˊ ㄗ ㄔㄤˊ ㄓㄞˋ ㄐㄧ ㄐㄧㄣ