10/10
اندازه ی عکس ها
✔ M - متوسط (792 x 528)✔ L - بزرگ (1008 x 672)
✔ بسیار بزرگ (1224 x 816)
✔ بزرگترین (1656 x 1104)
اصلی
The fully implantable cardiac pacemaker from Elema-Schönander was made possible by two inventions in the 1940s: small batteries and energy-saving transistors. A simple plastic cup was used as the mold. The first versions were affected by hairline cracks in the molding material. The electrode cable was also not sufficiently fatigue-resistant to stand up to the heart’s approximately 100,000 beats per day.
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- ایجاد شده در
- جمعه 15 مارس 2019
- برچسب ها
- Germany
- آلبومها
- Location
- View on OpenStreetMap
- امتیاز دادن به این عکس
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