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open gears
construct. 敞式〔无外壳〕齿轮装置
dril. 敞开式齿轮传动装置
oil 开式齿轮装置
tech. 敞式齿轮装置
open gear
oil 开放式齿轮
tech. 开式齿轮
open gears
: 6 phrases in 4 subjects
Hydroelectric power stations1
Oil / petroleum3
Technology1
Wind Energy1