In addition to the ultra-high definition astronomical telescope technology, there is another technology whose price is similar to that of the ultra-high definition astronomical telescope technology, that is, the normal temperature copper based superconducting chip technology.


    Because this foundation, like the previous ultra-high definition astronomical telescope technology, also needs 0.01 nanometer level, ultra-high precision CNC machine tools.


    In addition, in order to realize this technology, we also need a device far beyond the scientific and technological level of Wang Bin''s era, that is, a lithography machine with a precision level of 1 nm.


    Therefore, this technology, with the current ability of Wang Bin and Tiangong technology, as well as the energy currency in his hand, need not be considered for the time being.


    In addition to these two technologies, with the energy coins in Wang Bin''s hands and the overall scientific and technological level of their Tiangong technology and human civilization in reality, the ultra-high precision CNC machine tool technology is not needed for the time being.


    Even if he has enough energy money to buy this technology, it is impossible to realize this technology in a short time. At most, what can be realized in a short time is only to upgrade the domestic ultra-high precision CNC machine tool technology to the international top level.


    However, if only the ultra-high precision CNC machine tool technology is promoted to the international top level, in fact, Wang Bin does not need to buy technology from the system at such a high price.


    He believes that with the state''s current attention to these aspects, even without him buying technology from the system, Huaxia''s ultra-high precision CNC machine tool technology may reach the international top level in a short time.


    For example, the ultra-high precision CNC machine tools in Wang Bin''s Tiangong science and technology precision workshop, in fact, if only take the precision, there is not a big gap with foreign products of the same type, but there is a big gap in other performance, so we need to continue our efforts.


    In fact, among these technologies selected by Wang Bin from the system, not many can be selected for him. These technologies are copper based superconducting battery technology, copper based electromagnetic ejection technology, copper based superconducting coil gun technology and copper based superconducting railgun technology.


    Wang Bin looked at the only four technologies left in the system, thought about it and excluded the copper based superconducting battery technology, because whether it is electromagnetic ejection technology, coil gun and rail gun technology, these technologies include superconducting battery technology, that is, super large capacity capacitor technology, in addition to their own technology.


    Although Wang Bin wants the remaining three technologies in the system, he can only buy one technology with his energy currency, which makes it difficult for him to choose.


    At the same time, the prices of these three technologies in the system are not cheap. Among them, the price of superconducting electromagnetic ejection technology is 18 universal currency, superconducting coil gun technology is 16 universal currency, and superconducting rail gun technology is 20 universal currency.


    After thinking for a while, Wang Bin chose the copper based superconducting railgun technology with the highest price among the three technologies. However, when Wang Bin just bought the copper based superconducting railgun technology, the prices of the remaining two technologies in the system suddenly changed.


    Among them, the price of superconducting ejection technology has been reduced from 18 to 8, while the price of coil gun has been reduced more thoroughly, from 16 to only 6.


    Obviously, it can be seen from here that many technologies in superconducting ejection technology, superconducting coil gun technology and superconducting railgun technology are common. For example, the super large capacity superconducting capacitor technology required by superconducting railgun is applied in the other two technologies, or in fact, these three technologies are based on super large capacity capacitor technology.


    Although the price of the remaining two technologies has been reduced by more than half since he purchased the copper based superconducting railgun technology, he still can''t afford to buy any of them with the remaining energy coins in his hands.


    Because Wang Bin now has only less than 10000 energy coins left in his hands.


    After purchasing the superconducting ejection technology from the system, Wang Bin withdrew from the system and returned to the store of the science and technology mall. However, he did not return to reality, but quietly thought about the copper based superconducting electromagnetic railgun technology just obtained from the system.


    The railgun technology purchased from the system is called railgun technology, but in fact it is not. In fact, it is a complete set of technology, including ultra micro railgun technology that can launch projectiles with a diameter of only 0.1mm, and ultra large caliber railgun technology that can launch projectiles with a caliber of more than 1m or even larger.


    Of course, with the current strength of Wang Bin and Tiangong technology, it is impossible to manufacture a super large caliber railgun, because according to the technical instructions given by the system, it is not a simple thing to manufacture such a super large caliber railgun.


    First of all, in terms of time, because the energy required for such a super railgun to launch is very amazing, so the super capacitor must be manufactured first.


    Although the technical principle of super capacitor is the same as that of small and medium-sized capacitor, and the technical difficulty is not high, its volume is very huge, covering an area of more than 100 meters and a height of tens of meters.


    The most important thing is that the entire supercapacitor needs copper-based room temperature superconducting materials to manufacture. It is conceivable how many copper-based superconducting materials are needed. This alone can bankrupt Wang Bin''s Tiangong technology.


    Moreover, if only one such capacitor is needed, it may be possible to make it, but a super caliber railgun needs as many as five super capacitors.


    The second is the energy required to launch such railguns. It is not supported by ordinary civil or industrial electricity at all. It must be supported by professional power plants. Of course, nuclear power plants are the best.


    Therefore, although Wang Bin has the technology of manufacturing super railgun in his mind, it can not be realized in a short time.


    Of course, if such a super electromagnetic railgun is manufactured, its use is not small. First of all, if such a railgun fires with maximum energy, its firepower is absolutely enough to cover any place on the earth, which is an absolute great deterrent to any country on the earth.


    Secondly, with the capability of such a railgun, it can absolutely put any object weighing less than 10 tons directly from the ground into space orbit.


    In other words, if there is such an orbital gun, launching satellites less than 10 tons does not need rockets at all. Directly using such an orbital gun can put the satellite into orbit, which can definitely save countless funds in terms of launch cost.


    Therefore, the use of such railguns is also very huge. They can even be used to deal with threats from outside the earth, such as asteroids, comets and meteorites.


    Of course, with Wang Bin''s ability of Tiangong technology, although they are still unable to manufacture super large caliber electromagnetic railguns.


    However, there is no problem in manufacturing railguns with a caliber of less than 200 mm, especially small and medium-sized railguns with a caliber of less than 100 mm.


    At the same time, it is naturally no problem to manufacture rail guns with a caliber of only a few millimeters or more.


    After browsing the technology in his mind for a while, Wang Bin was very satisfied with the technology purchased this time, so he withdrew from his mind.


    But when he withdrew from his mind, he found that there were people in his Tiangong technology store besides himself. The most important thing is that although the guest was not a customer who had been to Tiangong technology before, he was very familiar with it, because the customer was Tony, one of the protagonists in a beauty man!


    Seeing Tony in Wang Bin''s shop at this time, Wang Bin''s heart was suddenly excited. This is the famous iron man! As long as he can stabilize this customer, it is absolutely not a problem to obtain some technology from his universe in the future. Let alone others, only the technology owned by iron man is worth Wang Bin to win him at any cost.


    Most importantly, in the world of iron man, there are anti gravity technology and cold nuclear fusion technology! These technologies are the key technologies for the promotion of civilization level, and Wang Bin can never give up these technologies.


    So he immediately went up and said to iron man, "Hello! Welcome to our Tiangong technology store."


    Hearing Wang Bin''s words, the iron man didn''t speak, but just nodded to Wang Bin and continued to stroll around his shop.


    At the same time, Wang Bin also saw in the eyes of iron man that he disdained most of the products in the store. Obviously, in his eyes, most of the products in the store could not enter his eyes. Obviously, this technology is some backward technology for him, or for his world.


    The iron man looked quietly for a while, picked up a piece of special high-temperature resistant glass and looked at it. It was obvious that he was still interested in special high-temperature resistant glass. However, according to the evaluation of the system, the glass he had previously obtained from the system was rewarded by the novice of the system, so the technical level of these glasses was relatively high, So Tony''s interest in its manufacturers is not difficult to understand.


    After watching it for a while, Tony said to Wang Bin, "shopkeeper, in your shop, except for this kind of glass, it doesn''t mean anything to me."


    Tony thought about it and said to Wang Bin directly, "give me ten tons of glass!"


    "OK, this gentleman doesn''t know what type of special glass you need?" Wang Bin asked.


    Subsequently, Tony chose more than ten models of flat glass in Wang Bin''s shop and paid directly to leave.


    Tony doesn''t pay much attention to himself. Wang Bin is not angry. After all, people basically despise these products in his shop! But fortunately, not all products he can''t see. At least he still needs special glass.


    And Wang Bin is also confident that after he bought these glasses this time, he will definitely come to buy them in the future, so it''s not too late to find a way to obtain technology from him in the future!