[经] ratio of pledged assets to longterm debts

dǐ yā zī chǎn duì cháng qī fù zhài bǐ lǜ ㄉㄧˇ ㄧㄚ ㄗ ㄔㄢˇ ㄉㄨㄟˋ ㄔㄤˊ ㄑㄧ ㄈㄨˋ ㄓㄞˋ ㄅㄧˇ lv4