
For fine edits slates sharpened pencils designers and architects typically use fine-grained sandpaper. But it may not be in the right moment at hand. Then I do the just use for this purpose a matchbox: always available, convenient, and the result is not worse. Gravityzoo-impromptu to make you less than a minute, even to glue nothing. The bottom wall of the lid box is cut, bend the top half and walls with arch beef up. The resulting “accordion” put in a match box-boxes (in the figure it is clearly shown) — it is well kept there as a spacer. I think additional explanation is not required.
E. SAWICKI, Korosten, Zhytomyr region.
Recommend to read
FORCING THE “D”
Device for Dismounting of bearings is shown in figure 13. They are as follows: from the bearing, remove the separator, pushing the balls enter between the collars of the bearing lugs is...
STIRLING ENGINE
The Stirling engine is a heat engine invented by Robert Stirling in 1816. It differs from the internal combustion engine because the fuel burns outside the engine, making it much...