I am a primitive

Grinding and drilling of bones are difficult and time-consuming, but with the people of the original bone tribe who are good at making bone tools, they can be made slowly. The most important thing is that the polished bone hoes are not strong. .

"Crack..."

A crisp sound came clearly along with the tremor of the hoe handle.

The corner of Han Cheng's mouth twitched, and he knew without looking that the bone hoe he had just made was scrapped again.

He lifted his hand up, and the bone hoe handle was easily picked up by him.

However, the bone hoe connected to the wooden handle did not rise together, but remained in the ground.

It is still broken from where the hole was drilled through the wooden handle.

Han Cheng sighed, the bones were still not strong enough to bear too much force, it was fine not to use it for digging the ground, as long as it was used for digging the ground, after the bone hoe dug into the soil, it took only a few times to lift it hard, and the bone hoe was fine. The upper part will not be able to withstand the force and will break apart.

Han Cheng sniffled. It seems that this bone hoe can only be used for weeding in the future, and it is impossible to use it for digging.

Turning the ground, a variant of the hoe-a shovel or a three-toothed rake is more efficient to use and easier to use than a bone shovel.

The so-called 敢头 is similar to a hoe, the difference is that it is heavier, narrower and longer than a hoe, and is tall and slender with weight.

Such a tool can easily dig into the soil.

The three-tooth rake is also a very good tool for digging land because of its small resistance and sharpness.

Not to mention the three-tooth rake, it can only be made of steel.

Wood can also be made, but it is just a silver-like wax gun head, which is used to plan the ground, and it can be explained in two or three strokes, which is cleaner than a bone shovel.

So the only thing that can be considered is the head.

After a series of previous experiments, Han Cheng already understood that what is made of bones can only weed and loosen the soil, but not dig the ground.

Under limited conditions, the only materials that can be used are stones.

According to the shape Han Cheng drew on the ground with a tree branch, Wood, the first mason of the Qingque Tribe, spent three days beating a hard stone into a shape five centimeters wide, twenty centimeters long, and three inches long. centimeter thick stone.

Mu Mu, who is very patient, is not afraid of these things at all, as long as he does it little by little, he can always do it well.

But there was one thing that made him difficult, and that was to cut a hole through the wooden handle on the upper part of the hammered stone bar.

It's not that wood has never been used to make holes in stones. You just need to use another sharper and stronger stone to dig holes carefully on top of it. After a long time, you can make a hole.

But the ones he chiseled before were all relatively thin stone flakes, and stones as thick as they are now have never been chiseled.

And Shenzi has additional requirements. Not only must the hole be made large, but it must also not affect the firmness of the entire stone bar as much as possible...

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Mu Mu is a very patient and stubborn person, otherwise he would not be smashing against the stone all day long, and he would never get tired of it.

Although the task entrusted by Shenzi was arduous, he did not shrink back. After sitting there for a while, he found a stone and began to knock on the circle that Han Cheng had circled on the stone bar.

In any case, you still have to do it yourself, sitting there imagining, it is impossible to think of a eye on the stone strip.

"Clap clap clap..."

There was a sound of knocking. After the stone was hit, there was a pungent smell, and stone chips flew out. Gradually, shallow pits appeared on the stone strips.

Wood's work was stopped by Han Cheng.

It's not that the wood is not made carefully enough, but that the hole dug out by this percussion method is the kind of cone with a large outside and a small inside.

In this way, even if the stone hole is finally made out, it is still not suitable for the handle of the shovel.

Because the weight and volume of the stone shovel are placed there, the handle of the shovel should not be too thin, at least two and a half centimeters in diameter.

According to the current method of wood, a hole with a diameter of two and a half centimeters is made on the stone bar, and the top is almost chiseled to the edge of the stone bar...

This kind of hoe is used to plan the ground, and its fate is similar to that of a bone pick. Basically, it will break from the place where the wooden handle is attached after a few hits...

The best way is to use a drill bit to drill holes in it, so that the drilled holes are generally thick inside and out.

Drilling holes in stone requires a metal drill...

This alone is enough to make Han Cheng helpless.

If he could make metal drill bits, where would he make stone drill bits?

It would be nice to build one directly out of steel.

Is it possible that we can only use a bone shovel to dig the land in the future?

Han Cheng frowned.

Then he smiled helplessly, and when he came over by himself, he got on the drill hole.

Last time it was wood, this time it was stone, this is really fate.

Wood is also frowning.

The man who had been so patient now felt very lost.

Because, as the number one stonemason of the Qingque Tribe, he couldn't meet the requirements of the Son of God, and couldn't drill a suitable hole in the stone...

As the second senior brother's condition improved day by day, Wu felt relaxed and was in the mood to lick the rabbit again. When he found out Han Cheng's distressed state, he took a rabbit he had trained to be honest, licked it all the way over, and asked.

Han Cheng spoke out about his difficulties, and Wu felt very sorry after hearing this.

The bone shovel that can dig the ground is already very useful in his opinion, and the shovel mentioned by Shenzi is more suitable for digging the ground than the bone shovel, especially the kind of hard ground.

Knowing that there is such a tool that is of great benefit to the tribe, but can't make it, it's a pity for a person like Wu who has nothing to do with the tribe.

He couldn't help with the matter of drilling holes in the rocks. The most intelligent son of the tribe and the wood who dealt with the most stones were helpless about this matter, let alone him.

Do you have to use a metal drill bit to drill holes in stone?

How did the holes in the stone tools from long ago come out?

Han Cheng, who had been thinking about how to get some steel out, found that he seemed to have entered a misunderstanding.

No one said that metal drills are the only way to drill holes in stones!

Just don't use metal drill bits and what material tools and methods should be used?

"Have it!"

Han Cheng, who couldn't sleep with Bai Xuemei in his arms at night, suddenly cried out excitedly.