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acid-free
 acid free
anim.husb. 无酸的
| oil
 oil
hydroel.st. ; 石油
met. ; 润滑材料; 润滑剂; 润滑
oil 原油

to phrases
acid free
anim.husb. 无酸的
acid-free [ˌæsɪd'friː]
tech. 无酸的
acid-free: 42 phrases in 21 subjects
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