"Writing" is similar to the embodiment, except that the idea is used to form a spiritual gold plate, and then the font is highlighted with the idea, which is equivalent to a special usage of the embodiment.

"Printing" is to use the function of embodiment or writing, obtain an engraving made of spiritual gold, and then put it in the printing press, and then print something.

In reality, the printing press used is to carve out a mirror font on a lead block, and then combine it into a certain style, and then print it on the paper after being stained with ink to form a book; the printing function is actually to use spiritual gold instead of lead movable type, which is faster and more convenient to print.

The next thing Zhao Dagui will do is to mainly use the functions of "rubbing", "copying" and "printing" to obtain the ability to manufacture precision parts.

First of all, he took out a high-precision copper ruler, which is a ruler that can measure the length of one meter and the smallest size is accurate to the millimeter, which is no different from the steel ruler of the modern world, but it is made of brass, which is stronger and more accurate.

The scales on this copper ruler and the numbers used to mark the size are recessed, as is the case with modern steel rulers.

At this time, Zhao Dagui's main god library stored more than 13,000 taels of gold, and as soon as his mind moved, spiritual gold flowed out from his fingers, and then wrapped all the copper rulers and closed them tightly.

In the end, Zhao Dagui's heart moved, and the spiritual gold covering the copper ruler was collected into his body, and entered the main god space, forming a mold for rubbing the copper ruler.

The mold is hollow inside, and the shape is exactly the same as the original copper ruler, and even the scale marks and size mark numbers on the copper ruler are perfectly reproduced.

This is the most basic function of Lingjin "rubbing", which can cover a certain item and form an exact mold, and it is extremely accurate, and the engraving on the copper ruler is very shallow, but it can also be perfectly reflected.

The next thing is simple, in the main god space, let the spirit gold be injected into the spirit gold mold like a liquid, "copy", and finally let the peripheral rubbing mold be removed, Zhao Dagui obtained a spirit gold ruler, which is exactly the same as the original brass ruler.

"The first step is complete. Zhao Dagui was a little excited, with this spiritual gold ruler as a reference, Zhao Dagui's future spiritual gold control scale can reach the millimeter level, as for the length of more than one meter, it can be connected with many one-meter rulers, but don't worry.

It's just that the size control is only at the millimeter level, which is still a little insufficient for Zhao Dagui.

Then, Zhao Dagui took out the spiral micrometer again.

Vernier calipers and micrometers have not yet been invented in this era, but there is a spiral micrometer invented by Watt, the principle is to use the principle of spiral propulsion, install a relatively large round handle on the screw, and every time the handle rotates, the screw can advance a small distance, and then engrave a scale on the handle of the screw to measure a very small distance.

The principle of this micrometer is very close to that of vernier calipers and micrometers, but it is not very convenient to use, but it is accurate enough in terms of measurement accuracy, and can even be accurate to about 0.01 mm.

Zhao Dagui used spiritual gold to form a number of cubic spiritual gold nuggets, and then measured their thickness, some of which even differed by only about 0.01 millimeters.

Zhao Dagui imported all these cubes into the main god space of Zhihai and used them as references.

Then, Zhao Dagui dismantled all the micrometers and restored them into parts, and then used the "rubbing" and "copying" abilities to copy the spirit gold nuggets that were exactly the same as these parts in the main god space.

In this way, the preliminary preparation work has come to an end.

The main god space is a high-latitude space, which is an absolute ideal space compared to the low-dimensional real world, and many things that cannot appear in the real world can be easily achieved in the main god space.

As soon as Zhao Dagui's heart sank, he appeared in the space in a state of divine soul, holding a piece of spiritual gold in his left and right hands, and then let the end of the spiritual gold nugget form a sharp cone, and then let the spiritual gold form a thin line, from one tip to another--- which is the closest distance between the two fingers, that is, an "absolute straight line".

When learning geometry, the math teacher must say that there is no such thing as an absolutely straight straight line, and no matter how straight a line looks, it is not perfect, so the so-called absolutely straight curves and absolutely perfect circles can only exist in the imagination of human beings;

Physics teachers also emphasize that even light that seems to be straight is also affected by external factors such as gravity, so there is a certain arc, and it cannot become a truly and absolutely perfect straight line.

However, the main god space is a high-dimensional space, and the physical rules are very different from the real space, which is an absolutely ideal space, so as long as Zhao Dagui can easily obtain a truly perfect straight line here.

Then, make a straight line, fix one end of the line, let the straight line circle around the fixed end, and the trajectory of the other end will form an "absolute circle", let the spirit gold cover the trajectory of the end, you can get the "absolute circle" made of spirit gold, let the spirit gold cover all the areas of the straight line rotation, you can get the "absolute circle".

Then make this absolute circle rotate around a central axis to get an "absolute spherical shape".

Using a similar method, Zhao Dagui can obtain perfect "absolute cylinder", "absolute cone", "absolute cube", "absolute cuboid" and other absolute geometric figures that can never appear in reality;

Considering that the end of the gear should be an asymptote line, Zhao Dagui formed an "absolute circle", and then wound it with a spiritual gold wire to obtain an asymptote line after unraveling it.

Through some operations, Zhao Dagui obtained a large number of absolute geometric figures, which are priceless and of vital significance to the development of a civilization, but because there is no reference, these geometric figures only have shapes and cannot be dimensioned, which is a pity.

However, what Zhao Dagui has to do today is to dimension these geometric figures.

Take out the one-meter-long spiritual gold ruler made before, and then find an "absolute straight line", and compare the two to cut out a one-meter-long "straight line", which is then the standard one-meter length of the reference, which is equivalent to the main god space to obtain the definition of "one meter", and for the first time there is a definition of size, which is of extraordinary significance.

However, this Lingjin ruler is made based on a brass ruler, and the error of the brass ruler will inevitably be transmitted to the Lingjin ruler, and it is necessary to find a way to correct the error.

With this meter-long ruler to form a circle with a radius of one meter, and then make a straight line with a length of more than one meter and five, and extend the straight line vertically at both ends, this can be used as a compass;

Then, with the help of a compass, divide the 180 degrees of the semicircle into equal parts to obtain a 90-degree angle (using a compass to divide the rounded angle, which is also the basic content of junior high school geometry), then divide the 180 degrees in equal parts to obtain 90 degrees, then continue to divide in half to obtain 45 degrees, and then continue to divide in half...

In real space, because of the interference and error of mechanical entities, the angular accuracy of the circle that can be divided by the compass is limited, but the main god space belongs to the ideal absolute space, as long as you are willing, you can do it infinitely, Zhao Dagui obtained the angle of 180 divided by 1024 to the third power or even one fourth of the power, which is already very accurate.