Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
Arabic
English
Greek
Italian
Norwegian Bokmål
Polish
Russian
Swedish
Terms
for subject
Materials science
containing
不
|
all forms
Chinese
English
不
定期
非预定,计划外
的维修
unscheduled maintenance
不
透气
性
impermeability to gas
Get short URL