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jennwatson05 jennwatson05
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6 years ago
A rectangular form of beam restriction that uses two sets of adjustable lead shutters is a(n):
 
 extension cone
  wedge filter
  trough filter
  collimator
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alohacharlesalohacharles
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6 years ago
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jennwatson05 Author
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6 years ago
You make an excellent tutor!
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Yesterday
Thank you, thank you, thank you!
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2 hours ago
this is exactly what I needed
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