Next, use this steel to make the frame.
For example, two pieces of steel with a slider sandwiched in between.
The slider can be pushed back and forth.
Below the slider is a chisel or cutting tool.
Use this device to carve grooves into another piece of steel.
Ma Lin knew that some artists could draw straighter lines by hand than others could with a ruler.
So he believed that excellent grinders could indeed polish steel to be very precise, as if it were made with precision equipment.
Some artists' drawings are so realistic that they could easily be mistaken for photographs.
Thus, he believed that finding the right people and giving them time, they could indeed handcraft relatively standardized parts.
Because the quality of the steel is good enough, as long as they are careful, they can process it to be quite precise.
With the aforementioned equipment, he would be able to cut relatively standardized grooves into a steel plate.
