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operating gear
CNC 操作机构
met. 操纵机构
nautic., tech. 操作装置传动装置
tech. 闸开闭装置; 操作装置
water.res. 操作齿轮
operating gear: 20 phrases in 6 subjects
Automobiles1
Aviation4
Metallurgy1
Rail transport2
Space1
Technology11