Learn Chinese Smarter
fā zhǎn jiāo tàn huà xué gōng yè
发展焦炭化学工业
develop coke chemical industry
jiāo tàn lú
焦炭炉
coke furnace
shǐ yòng jiāo tàn shēng tiě
使用焦炭生铁
use coke pig iron
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