[机] acetone-methylene chloride solvent

bǐng tóng èr lǜ jiǎ wán róng jì ㄅㄧㄥˇ ㄊㄨㄥˊ ㄦˋ lv4 ㄐㄧㄚˇ ㄨㄢˊ ㄖㄨㄥˊ ㄐㄧˋ