24-09-21
Tubes and pipes in technical and everyday use Tubes and pipes in…

Tubes and pipes in technical and everyday use     In the beginning was the hollowed-out tree trunk, one of the first capillary tube to be crafted by human hand. With a vast array of models in the plant world to inspire him, Homo sapiens had a much…

Tubes and pipes in technical and everyday use     In the beginning…


Gratis
17-09-21
Auto-disable syringes are not for needle programmes Auto-disable syringes are…

Auto-disable syringes are not for needle programmes     WHO and its partners recommend the use of auto-disable syringes, "bundled" with the supply of vaccines when donor dollars are used, in all mass immunization campaigns, and also strongly…

Auto-disable syringes are not for needle programmes     WHO and its…


Gratis