"Huh? Such a thick piece of wood? It's really a bit difficult..." Facing the strange request made by Master Guardian, Old Wood was also frowning.

　　 It would be nice if the Guardian wants a thinner piece of wood, but his mouth is a thick piece of wood that three people hold together. This requirement is not to mention old wood, even the entire Gaoshu tribe is very difficult.

　　 "What? Isn't it difficult?" Shixiong asked.

　　 "It's not a question of difficulty, but the key is the time you asked for." Lao Mutou said helplessly.

If the guardian doesn’t ask for time, then it’s not difficult to deal with a big tree slowly. It will take two or three days to slowly chop it down. Back then, when the tribe made a wooden boat for crossing the river, it was used. This is a way to slowly bring down a tree with a big tree.

　　 This is not nonsense. In the past, there were no iron tools in the tribe. Tree felling was done with stone axes. More than a dozen people took turns to work. It would take at least two or three days to chop down such a thick tree.

　　 But Master Guardian wants such a thick tree in one day, the difficulty is not ordinary.

　　 "Is the tool not handed in?" Seeing the awkward color on Old Wood's face, Shi Xiong knew where the problem was.

　　 The three people hug a thick tree, which is almost one and a half meters in diameter at breast height. Without a large see-saw for two people, it is not easy to cut down such a big tree in one day.

　　 At the very least, use an axe. I'm afraid it is really impossible to complete this job.

　　 Don’t think it’s easy to cut a tree with a breast diameter of 20 or 30 centimeters with an axe, but if you cut such a thick tree, it’s no less difficult than a person pulling a curved plow to continuously plough dozens of acres of land.

　　 If you want to use an axe to pour down such a thick tree, you may not even be able to cut half of it. This axe will have to roll its blade.

The old wood took a sigh of relief and nodded quickly, "Yes, Master Guardian, without the right tools, we can only use an axe to grind a tree like this. If you want to cut down such a thick tree, it will take at least two or three days to chop down with an axe. After the tree is felled, and then cut off the extra branches, it will take at least another day or two. One day. We won’t be able to finish this job in the same time."

　　 Shixiong nodded, then thought for a while and said: "You all follow, I am going to make you a large see-saw. With this thing, the big tree held by the three can be felled in two hours."

　　 "Large saw? Is it the same big saw as the manual saw?"

"It's not the same. This kind of saw is much larger, and it requires two people to use it. It is specially used to deal with thick trees or thick wood. With this thing, it will be much easier to cut trees in the future. Go, call Go to the wood planer, I need his help."

　　 Old Wood turned his head and shouted at a granddaughter, the little girl ran out and called her uncle.

　　 When the stone bear brought the old wood to the open space in the center of the tribe, it happened to catch up with Lieutenant Ferguson with the hard bones. They were melting a pot of molten iron in a kaolin clay cauldron, and they wanted to build a new barrel for experimentation.

　　 It's better to rush early than to rush by coincidence, so the stone bear slapped his palm, and the pot of molten iron that had just been ignited for smelting became stone bear's.

　　 Lieutenant Ferguson was very dissatisfied.

　　 Is there any way to be dissatisfied? It's shameless to catch up with the boss, he can only endure it as a little brother.

　　 It will take a long time to melt this pot of molten iron, and this time is just right for Shixiong to make a mold.

　　 If you want to make a double-handed woodworking saw, it is obviously impossible to knock it out with a hammer. The best way is to cast. Anyway, this double-lift saw has not so fine requirements for the saw teeth. The casting method is most suitable for this kind of saw.

　　 The two sons of the wood planer and the cross saw brought their son’s bow drill and chisel and quickly rushed over. They were busy making salt in Xiaoyanshan.

　　 With so many new forces joining, the mold was quickly made.

　　 This is a long iron sheet mold with a length of two and a half meters, a width of more than 30 centimeters, and a thickness of about half a centimeter. One side of the iron sheet is straight, and the other side has serrations nearly three centimeters long.

　　 After the mold is finished, it will be calcined. Anyway, it is too late to dry in the shade, so I just burn it directly.

　　 After the pot of molten iron over there melted, the mold on this side was almost baked, and the wooden planer took the iron scoop and poured the molten iron into the mold.

　　 Because the mold is very thin, it cools quickly. After more than an hour, the two-and-a-half-meter-long double lift saw was freshly baked.

　　 Because it uses medium carbon steel, the toughness of this saw is quite good. However, the big saw is far from complete to achieve this level. There are two most tedious tasks. One is to quench the teeth to increase the hardness of the teeth; the other is to sharpen the teeth.

　　 These two tasks are very cumbersome, especially the sharpening of sawtooth. In the current situation of no electric grinder, the only way to sharpen the blade is manual.

Ferguson had seen this kind of big saw. He thought that the boss came over in a hurry and grabbed his own pot of molten iron to do something important. UU reading www.uukanshu.com turned out to make such a big saw. Can only helplessly shook his head to indicate that the boss is unreasonable.

　　 Ishikuma had no intention of comforting Lieutenant Ferguson, he just wanted to quickly get the big saw out, and then cut down a big tree thick enough to make an old-fashioned wedge oil press.

　　 Hardening the teeth of the big saw is also quite troublesome. After all, this big saw is too long and the quenching part is limited to the teeth, so this job is not only troublesome, but also difficult.

　　 But it's hard to stop Shi Xiong, although Shi Xiong has never done this kind of work, but he still has wood planing them beside him.

　　 There are three heads and one Zhuge Liang. There are several people around Shixiong, and there is also a second lieutenant Ferguson. After a little total, a plan for quenching the sawtooth comes out.

For this reason, the stone bear once again occupied the stove, but it was sealed with kaolin, leaving only a gap of about five centimeters wide. After the stove was ignited, the wind box was used to blow inward, so that the flame would pass through it. A gap emerged.

　　 Put the sawtooth part of this big saw in the gap, and quench it after the flame burns the sawtooth red.

　　Although this work can only be done one step at a time because the stove is small, the two and a half-meter long saw teeth can all be quenched by doing a few more times.

　　 For this reason, Lieutenant Ferguson also had to temporarily put aside his work and help the boss with the big saw.

　　 A few people were busy working all afternoon, and this saw with hardened serrations was completely completed. As for the cutting edge, although it is very cumbersome, it is not a big deal for Lao Muzuo and his family. This kind of meticulous work can be done by La Muzi, his two sons or his two grandsons.

　　 If you play five together, you can finish this saw in one night!