Retractable ladders, from a Direct stepladder

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[>>>] Generating Attributions log:

[0] Thing Title : Retractable Vampire fangs
[0] Thing URL : http://www.thingiverse.com/thing:15715
[0] Thing Author : Gael_Langevin
[0] Thing Licence : Creative Commons - Attribution - Share Alike

[1] Thing Title : ProtoBot
[1] Thing URL : http://www.thingiverse.com/thing:18264
[1] Thing Author : avalero
[1] Thing Licence : Creative Commons - Attribution - Share Alike

[2] Thing Title : C