The icy night breeze blew in through the window, and the humming sound of the lathe running filled his ears, which seemed a little noisy, and Han Xiao chatted with Lu Qian casually.

"You've been doing this shop for a long time, how's the business?"

Lu Qian's long hair was coiled up at this time, wearing a protective mask, and she was welding metal with her head down, and she didn't raise her head when she heard the words, and said: "The location is so remote, of course the business is not good." ”

"You were busy when I came in."

Lu Qian shook her head: "I'm the only one in the store, and there is a backlog of orders, of course, I have something to do at any time." ”

"Won't you ask for help?"

Lu Qian paused, sighed softly, and said, "Please, let's go." ”

"I guess the salary is too low." Han Xiao shook his head.

"Is that the reason?" Lu Qian's tone was suspicious.

She is just an ordinary person, she doesn't know the information of those big events, Han Xiao didn't say goodbye back then, there was no news, and Lu Qian has always been haunted.

The apprentice who finally came in said no, and it was gone.

Although they didn't get along for a long time, Han Xiao left a deep impression on Lu Qian, there were only her and Old Man Lu in the store before, and one more person made her more angry, and the time spent together was quite happy. But after waiting for a long time, Han Xiao never came back, and Lu Qian's mood was depressed for a long time.

"Since business is not good, do you want to go somewhere else?"

Lu Qian shook her head, "This is my home." ”

Dense footsteps approached, and a field team quickly arrived in the darkness of the night.

At this time, the stunned field personnel woke up slowly, their faces changed drastically, and they immediately wanted to perform a tactical roll and get up, when suddenly a fist the size of a sandbag quickly enlarged in the line of sight.

Bang!

In front of the field team, Han Xiao threw him over with another punch.

"Don't move, raise your hands!" The field team raised their guns one after another, aiming at Han Xiao, and the captain shouted: "We are the Xinglong Territorial Strategic Defense Bureau, and now we suspect that there is something wrong with your identity, come with us." ”

Wow –

A few cold flashes of light disappeared, and the barrel of the field team's pistol suddenly broke off, and the cut was smooth.

The captain's face changed drastically, "Request for support......"

Bang bang bang!

Lu Qian's eyes flickered, and Han Xiao, who was sitting in a chair in the last second, was standing in the center of the crowd at this time, and the menacing field team fell to the ground in a blink of an eye, and with his attributes, there was no suspense in instantly stunning this group of ordinary field soldiers of about level ten.

"The defense force is too poor, I hope that this time I can make the thirteenth bureau increase the guards here...... Well, it's better to keep the players who come to do the quest from even getting in. ”

Han Xiao shook his head, took out a few thick stacks of banknotes, put them on the table, and turned to leave.

Lu Qian came back to her senses, looked at Han Xiao's back, and suddenly asked, "Have we met before?" ”

Han Xiao didn't look back, and chuckled, "I haven't seen it." ”

When his figure disappeared into the night, Lu Qian put down the work in her hand, took off the protective mask, stroked the hair that fell from her sideburns, and suddenly smiled, revealing a tacit smile.

……

Smuggled out of the Western Capital and got on the helicopter that returned to the shelter, Han Xiao took out the four drawings he had in hand and looked at them carefully.

[Drawing-Magnetic shield chain floating shuttle]

[drawing-tone batting ball wearing]

[Blueprint-tone batting shock]

[Blueprint-Tone Shots]

These four types of machinery form an independent combat system, both offensive and defensive, and the three different types of sound hitting are the core equipment, with different functions and complementing each other. As the name suggests, the principle of tone hitting is related to sonic attacks.

Ultrasonic and infrasonic waves are through-type, focusing on lethality; Noise waves and strong sound waves are seismic and heavily controlled; The probe heavy assist, which is related to sonar detection, can also enhance the power of the other two tones, and can transform and adjust the ambient sound in a certain area to form a special area that amplifies the sonic attack...... By the way, it has an MP3 function.

The learning requirements of these four drawings are level 45 and the intelligence is more than 250, and the knowledge required to be mastered is [Basic Acoustics Lv5], [Basic Mechanical Engineering Lv5], [Basic Energy Theory Lv5], [Basic Energy Conversion Lv5], [Basic Wide Area Induction Lv3], [Basic Electromagnetic Principles Lv4], Han Xiao now has 68 potential points, and spends 12 points to upgrade knowledge to meet the learning requirements.

A day later, Han Xiao returned to the shelter and immediately set about manufacturing.

The core principle of sound hitting is acoustics, the most important thing is the transmitter of sonic attack, which needs to use electromagnetic sheets to form a condensed sound frequency pipe, according to different types of sonic attacks, the subtleties should be adjusted, and these pipes are connected to form a three-dimensional spherical frame, the technical difficulty is high, and it took him a lot of time to finally create a finished product.

Three metal balls lay quietly on the lathe, about two-thirds the size of a human head, not rounded, but angular, with cold armor on the outside to protect the inner core, and a vent for sonic attacks hidden in the gaps in the armor.

The original control method was gesture + whistle, but Han Xiao changed to neural link control, wearing a special headset generator, converting neuronal signals within a radius of 60 meters, and being recognized by the internal receiver of the sound hitting ball to achieve the purpose of control.

"Get up." Han Xiao's thought moved.

The bottom armor of the three-tone shot unfolded, revealing a swarthy hole, spewing out a white tail flame, which flew up and suspended in mid-air. The pitch has the ability to fly and can move flexibly in the air, which is a medium-distance means of combat. Han Xiao became familiar with the operation method, and his heart flashed.

Immediately after testing the power of the sound shot, he observed, the sound hitting and piercing attack distance is about 20 meters, the piercing type is mainly used to kill the target, ultrasonic and infrasonic pulses can cause large armor-piercing damage, attack the target through obstacles, the attack range is directional linear and inverted cone.

The basic attack power of sound hitting ball piercing is 81~130, which seems not to be high, but in fact, the characteristics of sonic attack are highly armor-piercing, and the damage reduction is very light, plus Han Xiao's attribute bonus and skill bonus, one shot down, can cause 350~400 damage, if you add critical hits and will burning, it is simply chasing the wind and the moon without mercy, and the same burst damage is no less than the ghost high-death sniper rifle with a basic attack power of more than 250. In addition, the output of the sound batting ball piercing is more stable than that of the Ghost Gauss Sniper Rifle, which can be used as a regular main combat method.

The sound hitting ball is the range control, the sphere is shaken, bursting with high-frequency pops, noises and strong tremors, causing vertigo, concussion, paralysis, coma and other negative states, the attack area is a circle with a diameter of 10 meters, and the sound hitting probe is to expand the sound wave amplification field with a diameter of 100 meters to strengthen the damage and effect.

Boom!!

Sonic Piercing slammed into a crater in the steel wall, making a loud bang.

The tone shot is precisely constructed and used to ram not because of the head iron, but to test the internal impact resistance, which loses 17 points of durability, compared to 1600 points for the tone shot.

"If you hit it, you lose 1% of your durability, and if you are attacked, it seems to be a little brittle." Han Xiao said in his heart.

The three sets of sound hits one attack, one control and one auxiliary, complementing each other, and the defense is completed by the magnetic shield chain floating shuttle, which is similar to the principle of the magnetic chain split blade, but this floating shuttle is used for defense, which essentially belongs to the "shield generator", and the floating shuttle forms a shape in mid-air as an endpoint, which is electromagnetically linked to each other, automatically interlocked, and the shape of the frame becomes an electromagnetic shield.

Shield technology is a common technology in the universe, but there is basically no formed shield technology in Aquamarine, and by the standards of the universe, this shield-type shield that can only defend on one side is a prototype technology, but it is a very rare machine in 1.0.

He can control up to four tones to hit the ball, and no matter how much he will be distracted, the operation will not be so subtle, for mechanics, it is not that he can immediately exert all his functions when he gets a powerful machine, many exquisite machines need to be proficient before they can be used flexibly, and the level of mechanical players is also reflected in the use of skilled machinery, which is considered a micro-operation.

But for the experienced Han University technicians, let alone micro-, what are you...... Phew, anything goes.

"With the sound hitting system, I already have four conventional tactics, the core system is the Teng Snake Mecha, with the other three, long-range, melee, and mid-range, which can cope with various situations, which is enough, and there is no need for a new tactical system in a short period of time."

Han Xiao suddenly thought that he had cut off Lu Cheng's things, and when Lu Cheng got the replacement drawings, he didn't know what the reaction would be, and Old Man Lu might have to come to the door to complain.

It's okay like this, he hasn't seen Lao Lu Tou for a while, and he misses the magnificence of thousands of miles of snow.