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noun | adjective | to phrases
backgear n
gen. 后〔减速,后倒〕齿轮
backgear adj.
avia. 背轮; 跨轮; 慢盘齿轮
oil 背齿轮; 倒挡; 倒挡齿轮装置; 后倒齿轮
backgear: 2 phrases in 1 subject
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