VID00122

[@aerialrescuesolutions3277]

Awesome...... Thank you, Jim

[@tolearnandteach2595]

Low budget films, critically valuable knowledge 👌

[@alllosers69]

Thank you very much

[@filteredview9302]

yes i have a question a decade later. how did you calculate that 1 Ci of Iridium was 5.2r/h at 1 feet. thank you