The need to sample a semicircular groove often occurs during the manufacture of home-made furniture or the construction of a garden shed. How to do it without the special tool! The figure shows the method of manufacturing such a groove with a conventional circular saw — a workpiece moving along the inclined installed a bar-rail. The tilt angle depends on the width of the groove and determined by the elementary measuring instrument of the type of a parallelogram and the line.
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If the bath tube or sink due to the loose fitting to the drain hole allows water to enter, then restore its tightness is easiest with a rubber fingertip — just need to fit them to the tube.
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