CPC Subgroup
G21F 5/04 Means for controlling exposure, e.g. time, size of aperture (controlling exposure to X-radiation H05G1/30)
Full Title
Transportable or portable shielded containers > with provision for restricted exposure of a radiation source within the container > Means for controlling exposure, e.g. time, size of aperture (controlling exposure to X-radiation H05G1/30)