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bleeder hole
auto. 放泄孔
construct. 泄放〔通风〕孔
el. 泄放孔
tech. 流放孔; 抽气孔; 排泄孔; 通气孔; 出气孔
telecom. 通风孔; 气孔
bleeder hole: 2 phrases in 2 subjects
Electric machinery1
Plastics1