[经] bill of approximate quantities contract

gū jì gōng chéng liàng dān jià hé tóng ㄍㄨ ㄐㄧˋ ㄍㄨㄥ ㄔㄥˊ ㄌㄧㄤˋ ㄉㄢ ㄐㄧㄚˋ ㄏㄜˊ ㄊㄨㄥˊ