DictionaryForumContacts

   Chinese English
Google | Forvo | +
to phrases
坚硬岩
hydroel.st. hard rock
tech. ledger rock; sound rock (石)
坚硬岩: 42 phrases in 8 subjects
Architecture1
Drilling3
Engineering geology7
Explosives and Explosive Ordnance Disposal6
General2
Hydroelectric power stations2
Oil / petroleum2
Technology19