The standing frame 12 is secured to the base 11 utilizing the set screw 25, and the substrate 15 is then mounted in {TAIL ~ position} onto the base 11 so as to cover the central opening 21 and be in {HEAD ~ full engagement} with the registration surface 22 
The standing frame 12 is secured to the base 11 utilizing the set screw 25 , and the substrate 15 is then mounted in { TAIL ~ position } onto the base 11 so as to cover the central opening 21 and be in { HEAD ~ full engagement } with the registration surface 22
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