When sawing any, but in particular plastic pipes (due to its “softness”) to withstand the cutting line is exactly perpendicular to the axis (or if necessary – on the contrary, under the right angle) will help the duct tape. Wound appropriately a ring from it will not allow the cutter to get off.
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MOTORBOAT “MIRAGE”
In my time, I had the opportunity to build and test many motorboats. The first to hit the water was the motorboat "Zvezdochka", whose drawings were published in the October 1966 issue of...
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...make a surface gauge. In the block of hard wood drilled a hole in which is screwed into the screw. Use a screwdriver to set the distance required for the application of risks. ...