Public Timelines

For educational institutions For teachers For students Cabinet

For educational institutions For teachers For students Open cabinet

FAQ Получить премиум

Create a timeline

Public timelines

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

31 март 1939 г. - siemens

Описание:

siemens produced the first commercial transmission electron micrscope

Добавлено на ленту времени:

alex

ByAlexander Brusacoram

30 окт 2017

0

0

521

Дата:

31 март 1939 г.

Сейчас

~ 86 г назад

About & Feedback Соглашение Приватность FAQ

Cabinet Get premium

Donate

The service accepts bank transfer (ACH, Wire) or cards (Visa, MasterCard, etc). Processed by Stripe.

Secured with SSL