例句與造句

1. Sandersons had finally stopped using their cementation furnaces in the 1920s, and Kayser Ellison soon demolished these, along with the west range of crucible steel shops from the 1870s.
2. At that period, if steel was needed, particularly pure varieties of iron were heated with charcoal in a cementation furnace to produce blister steel ( with about 1-2 % carbon ).
3. It's difficult to find cementation furnace in a sentence. 用cementation furnace造句挺難的