|
Wilhelm Rontgen invented |
|||
|
(a) |
radio |
(b) |
X-ray machine |
|
(c) |
electric bulb |
(d) |
electric motor |
|
Wilhelm Rontgen invented |
|||
|
(a) |
radio |
(b) |
X-ray machine |
|
(c) |
electric bulb |
(d) |
electric motor |