Definitely interesting clue is given in No. 2, 1982, in the article “Handsaw — a universal tool” to fix on one drank the landlord several Polota. Want to offer a design that allows to change the distance between the blades. To do this, make two threaded rod-holder, fixed on the ends of the hacksaw. It remains to screw them into the nuts-limiters; sequentially inserting and fixing the saw blades, will get a “multicore” with a hacksaw, three or five simultaneous cuts.
V. SESNY, Kherson