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预精炼
 预精炼
met. preliminary refining; prerefining
| 装置
 装置
gen. installation
hydroel.st. setting; appliance
met. arranger; assembly
rem.sens. accommodation
sport. facility

to phrases
预精炼
met. preliminary refining; prerefining
预精炼: 11 phrases in 2 subjects
Metallurgy10
Technology1