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mechanical booster
 mechanical booster
tech. 机械升压器
| pump
 pump
baseb. 大抡臂投球
environ.
footwear 高跟鞋
hydroel.st. 抽水机
met. 抽气机
mining. 泵抽; 泵抽
tech. 水泵;

to phrases
mechanical booster
tech. 机械升压器
mechanical booster pump
: 4 phrases in 4 subjects
Automobiles1
Aviation1
Electronics1
Mechanics1