Neat craftsman, working in his workshop, be sure to tie a safety apron — so as not to stain or damage clothing. And not to bother with a drawstring, it is better to attach to the apron two wire hook: hook them or lose one moment.
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The first attempts to improve operational mobility artillery through the installation of various caliber guns on tracked or wheeled chassis has been made at the beginning of XX century....
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At school, for more than 40 years, engaged in the construction of various mechanisms to facilitate workplace and at home. (In the journal "Inventor and rationalizer" was placed in my...
