DescriptionScrew Key Padlocks.jpg English: I found it from my grandmother house i dont how much old it is but it think it should be in mesium Date 14 September...
DescriptionScrew key padlock.jpg English: I found it from my grandmother house i dont how much old it is but it think it should be in mesium Date 14 September...
Front Cover of Spirit slate writing and kindred phenomena (page 9 crop).jpg...
E is a thumb-screw. The thumbs are put into two rounds holes at the top; by turning a key a bar rises from C to D by means of a screw; and the pressure...
