For many years engaged in bookbinding business. Stapling the sheet sets at the root, not sew them, string, inserting in the cuts the block with a depth of 3 to 4 mm sturdy thread in the shown sequence. Then coat the lace with glue— everything works faster and stronger.
O. EVDOKIMOV, Saint-Petersburg
Recommend to read
TWO PISTONS IN ONE CYLINDER
Our magazine has repeatedly written about the works of children's technical club at HCS Institute of inorganic materials, which for many years was headed by engineer A. S. Abramov. Here...
DISCRETE CUTTER
Who ever cut on a lathe a series of identical parts of complex shape, he knows how difficult it is to do the same in their configuration. In the secondary school № 2 of Donetsk city...
