4 ms·
For those of us not in the know: https://orau.org/health-physics-museum/collection/consumer/products-containing-thorium/welding-rod.html https://orau.org/health
by dtgriscom 3y ago
For those of us not in the know: https://orau.org/health-physics-museum/collection/consumer/products-containing-thorium/welding-rod.html https://orau.org/health-physics-museum/collection/consumer/p...