How do we see the plaster line?
Crossed. Put the plaster line in the slot, play it on the mouth, and see the plaster line as a 45 degree bevel. The saw will change direction. See the one, the two 45 degrees and the angle of 90 degrees
Or according to the width of the gypsum line to make a groove, the upper side of the online groove with a saw saw 45 degrees angle of the mouth.
