Angina is a type of chest pain caused by reduced blood flow to the heart muscle. It often feels like pressure or squeezing in the chest and can be triggered by physical exertion or stress. Plus, Tightness in the chest, discomfort that may radiate to the arms, neck, jaw, or back, short...
29. Gray iron--an alloy of iron carbon and silicon ; easily cast; good pressure tightness in the as-castcondition. 灰口铁--一种铁碳和硅的合金;易于铸造;在铸态下具有很好的压力紧固性。 来自互联网 30. Sometimes this can be a sharp pain between the shoulder blades; at other times it's ju...
Aortic dissection symptoms are: Chest pain that occurs suddenly and is described as “ripping” or “tearing” in nature, radiates to the back or between the shoulder blades. It can be an angina-type of pain, with shortness of breath, fainting, abdominal pain and symptoms of stroke. Pulmona...