Zhang Wei ordered the manufacture of blasting cylinders, and they all got busy, He Kun led the baggage platoon to the black market to trade and buy back the steel pipes, while the engineer platoon suspended daily training and began to prepare for trial production.

The engineer platoon is all veterans, and the suspension of training is not a big problem, and as soon as He Kun's materials are brought back, the trial production work will start immediately.

He Kun spent a lot of money to buy things this time, seamless steel pipes are difficult to make, and those that can be mass-produced are all great powers, and they have high requirements for industry.

It can also be made in China, but the production capacity is really limited, and the production capacity of that idea is basically used to supply the production of mortars and grenadiers in the arsenal, and it has always been in short supply, and it is not easy to find on the black market.

However, the teaching brigade was rich and wealthy, and He Kun led a large number of people, and under the attack of the silver bullet, he finally found the seller.

The seller used to be a comprador, that is, in the concession to help foreigners run business, and deal with the Chinese, after the war a large number of foreigners withdrew, this seller took the opportunity to dump goods, from foreigners to buy all kinds of goods at low prices, waiting for the opportunity to sell, foreigners here in China to set up factories are also quite a lot, bringing in a lot of building materials.

This guy happened to have a batch of seamless steel pipes made in the United States, which were originally intended to be used to build buildings and build water network pipeline facilities, but as a result, the Japanese and China went to war in an all-out way, and foreign investors did not want to muddy the waters in China.

He Kun bought fifty six-centimeter blasting canisters and fifty four-centimeter blasting canisters from him according to Zhang Wei's list, as well as a hundred steel rods and a hundred sheaths.

It cost ten gold bars, which is really not small. Buy a small amount first, and then buy in large quantities after the manufacturing is mature, which is Zhang Wei's current thinking. The baggage platoon brought back the things it bought, and all the men and horses of the engineer platoon, together with Zhang Wei and He Jinhai, were put into the trial production of the blasting cylinder.

On the other side of the training ground, the infantry were doing physical training, and the engineer platoon was working in full swing.

In front of Zhang Wei, the purchased steel pipes were neatly placed, and the first thing the soldiers of the engineer platoon had to do was to disassemble and assemble the explosives, and the allocated explosives needed to be disassembled into small pieces before they could be placed in the explosives.

"Captain, it's best to use as many of these explosives as you want, otherwise it will affect the effect of use, how many explosives should we dismantle?" He Jinhai looked at the explosives in front of him and asked.

"How many pounds of explosives do we have in this box?" Zhang Wei said.

"A box of explosives, about twenty-four catties."

"Twenty-four catties, our blasting canisters have a charge of three and a half kilograms, a small charge of two kilograms, and a box of explosives can hold eight large blasting canisters and twelve small blasting canisters, so that you let the brothers load twenty large and small blasting canisters, and when they are ready, listen to my order to test one batch, and leave another batch for storage and see."

"Okay, I'll give the order." He Jinhai said with a hint of excitement, due to the backwardness of military and military education, He Jinhai has never been in contact with the blasting canister, and he understands it completely through Zhang Wei's narration, and now he wants to really manufacture and try it, and he can't wait to see the effect of the blasting immediately.

He Jinhai conveyed Zhang Wei's order, and the soldiers quickly operated, in terms of manual work, it was still the veterans of the engineer platoon who played well, Zhang Wei planned to make 20 large and small blasting canisters, store them, and test the explosion. Zhang Wei and He Jinhai refined the drawings again, and He Jinhai explained the drawings to the soldiers of the engineer platoon with the real thing, most of the soldiers in the engineer platoon were illiterate, and there were only a few who knew how to read.

Give them the drawings, and it is impossible to construct according to the drawings, because they can't understand it at all, so they have to explain to them that He Jinhai, the platoon commander, teaches that the brigade is completely handmade, and it can't be too rough, especially the small holes on the blasting barrel, once the hole is too small when the war starts, and the steel rod can't be inserted, it will be miserable.

However, the most important thing at the moment is to carry out a tentative blasting of the blaster.

The soldiers first dismantled the two boxes of explosives into small pieces and put them into steel pipes, and all the steel pipes were opened with possible connection holes before loading the explosives, and the soldiers loaded the explosives, and then compacted the loaded explosives.

It will be down to install the fuse and the lead and the detonator, these things, the veterans are very skillful, it was completed in a few clicks, a blasting canister, it takes about half an hour to finish, the installation of explosives and detonator leads is not too time-consuming, the real time-consuming is to make a hole in the steel pipe.

The sappers did it very seriously, and He Jinhai told them that these blasting canisters were for their own use, and they would do a good job if they didn't want to be blown up by their own equipment, so the work efficiency was very high, and it took more than two hours for a platoon to complete the production of 40 blasting canisters of all sizes, and used up two boxes of explosives.

In all fairness, although the blasting barrel is simple to manufacture, it is not easy to build it well, and the Type 98 blasting cylinder equipped by the Japanese army is the same as all kinds of blasting cylinders equipped by foreign armies, all of which are equipment produced in industrialized countries, and the combination is flexible and standardized.

It is easy to put explosives into steel pipes, but it is rare to ensure the smoothness of combined use on the battlefield, as well as the preservation ability of blasting canisters.

Teaching the brigade that these handmade products are not standardized, and it is even more difficult to ensure quality control and quality.

Zhang Wei plans to test the explosion of a batch to check the power, and the rest will be temporarily sealed, and then blasted after a period of time to see what problems will occur.

The blasting canisters are to be produced in large quantities, and it is too late to rush to work before the start of the war, and there must be a stock in peacetime, so the blasting canisters of the teaching brigade must also be usable and preserved, so as to ensure that enough blasting canisters can be supplied to the troops during the battle.

The forty blasting canisters were not painted, and they looked like forty steel pipes, twenty short blasting canisters, and twenty long blasting canisters.

After He Jinhai and the sappers finished making the blasting canister, they lined up on the side, waiting for Zhang Wei's order.

"Ten large and small blasting canisters are drawn out and ready to be blasted for trial blasting, and the other ones are sealed in empty explosives boxes and sent to the ammunition depot for storage!" Zhang Wei ordered.

"Captain, where are we going to test the explosion, and what fortifications are we going to use to test the explosion?" The best way to test the power of the blaster is to see its ability to destroy the fortifications, so there must be a "test explosion" environment and conditions, by looking at the degree of damage to different fortifications by the blasting canister, to determine the power of the blaster, and the future combat is also beneficial.

With advance preparation, the soldiers were able to skillfully choose the number of blasting canisters to use against different fortifications.

"Let's use the bunker to test the explosion, let the brothers work harder, build two semi-hidden bunkers, build more sandbags and wood, build a stronger one, test the explosion with a blaster, and blast it again with an ordinary trench!"

Based on Zhang Wei's combat experience, the Japanese fortifications that he came into contact with the most were the semi-concealed bunkers of the Japanese army.