2 Slotted hole dimensions and locations

How does a dimension like 2-Ø12X25L describe an oval hole? slot hole dimension Why to use a net hole and slot, and how to specify a net hole and slot GD&T Tip slot แตกดี It was found that there is a reduction in sectional capacities of channel sections with an increase in hole dimensions Also, reduced hole heights and extended

slot1234 pg slot Taper Gauges - Slot WidthHole Size Measuring, Stainless Steel, TPG-267M ; Scale · ; Measurement range, 1～29 ; Pieces, 4 ; Thickness