Assertion: gamma ray's source | /r/HasProperty | pushed to the tip of the tube
Facets:
value: along the source guide tube
type: LOCATION
value: out of the shield
type: OTHER
Source sentences:
text: Using a hand-operated winch the source is then pushed out of the shield and along the source guide tube to the tip of the tube to expose the film, then cranked back into its fully shielded position.