مصادر الكيمياء موقع لتعليم الكيمياء بصورة مبسطة
Any of a group of related alloys used for making bearings. They consist of tin containing antimony (about 10%) and copper (1-2%), and often lead. The original alloy was invented in 1839 by the US inventor Isaac Babbit (1799-1862).
مقالات قد تفيدك :
