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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Universal cutter, known as the boot knife-Bong, easy to use, but inconvenient to store. If he give such a construction as shown in the figure, in inoperative position it will be just as...