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to phrases
release cock
construct. 放气活门〔旋塞〕
met. 放气旋塞; 放出旋塞; 减压门
railw. 缓解塞门
tech. 放气活栓; 放气活塞; 放气活门; 放气阀 (门); 放泄旋塞
release cock: 2 phrases in 1 subject
Technology2