What does engineering construction JFC mean and what does communication construction do?

JFC - probably a fireproof window, the general fireproof window is expressed as FHC or FH, consult the design for details; 1520 generally refers to a width of 1500mm and a height of 2000mm (but it can also be carried, please refer to the door and window table for details).

F - the symbol is the first letter of the pinyin (fang) of "defense", which means that the window has the function of "fire prevention".

Good afternoon, JFC is a kind of nonionic surfactant, after adding the aqueous solution and leaking the book, it can greatly reduce the surface tension of the cocoon to make it disperse in the solution, Qi Chunkai also improves the sedimentation rate in disguise, similar to JFC, fast T and fluorocarbon, which can strongly reduce the surface tension and take into account a certain demulsification force, try not to add too much, please refer to. Depending on the charge on the surface of the cocoon layer, the same charge provides repulsion to reduce sedimentation, and the opposite charge attracts to the effect of aggregation and sedimentation, which is similar to that of JFC.

The beginning of the upstairs is pure nonsense, what c represents China, nonsense. Do you want to say that R400 2784A52 is being sold in 2 countries?

I'll teach you a few tips on how to distinguish parallel goods, which the service station engineer taught me, which is easy to learn.

First: You have to see if there are 3 labels on the back of this machine, namely: host model serial number, Microsoft certification barcode, and network access license.

The serial number of the console model and the color label of Microsoft, especially the Microsoft label, are indispensable. Because parallel goods are generally torn off the label when they enter the customs. There are also many foreign machines that do not have a pre-installed system, and only DOS does not have this label.

And you have to see whether the color label is red and green, most of the foreign machines are red and blue, and only a small number of large domestic clients are red and blue, most of them are red and green, so if you want to see that the label is red and blue, you have to be suspicious.

Second: see if the machine has fragile stickers, because it is impossible for licensed machines to have fragile stickers, only parallel goods and repaired ones.

Third: There will be a xx xx number after the serial number of the host model, which is the date of manufacture. "You have to look carefully if it's a smooth slash, if it's a very smooth slash without a little particle, then this machine may be a good brushing machine.

Fourth: If you want to buy with confidence, you still have to go to Lenovo's partner gold and silver medalists to buy, don't go to Volkswagen, Suning, Gome and some stalls. Or go directly to JD.com to buy it.

The above pure hand-to-hand, if the landlord feels reliable, I hope the landlord chooses us.

The C behind the 3249JFC indicates that it is China, the model of the licensed goods, to determine where all the Thinkpads are sold, please check the official website to know, and you will know whether the Hong Kong parallel goods or the Chinese licensed goods.

China in the picture shows that it is a licensed goods, and the others are parallel goods.

ThinkPad notebooks can be distinguished from parallel imports in the following ways:

First, take a closer look at the packaging, generally**thinkpad's packaging is a one-time formed cardboard box, and the carton made by the merchant itself is very rough in workmanship, and it can't be the same as the first-class packaging at all, and you can judge whether it is a parallel goods machine from the appearance.

Second, check the machine configuration sheet after unpacking, under normal circumstances, ThinkPad** will put a packing list with the packing box to check the random accessories. In the eyes of parallel dealers, nothing else matters except machines, so there is no such thing in parallel trading. However, whether it is licensed or parallel import, you can see the location of the battery as soon as you open the box.

Generally, the battery and notebook are placed separately in the licensed packaging, and the parallel goods are tested because the dealer wants to check whether the screen has bright spots and dead pixels, so it is necessary to turn on the test, and the battery is inserted into the notebook.

This is not true, and this ** is not CCB's. CCB has already issued notices on WeChat, credit cards**, and Weibo, and I have also received SMS notifications from them, all saying that this kind of SMS is fake. Moreover, the noisy LED screens of various bank outlets in the streets and alleys are constantly scrolling, saying that fraudulent text messages cannot be trusted.

In fact, this text message is a message released by ** with a pseudo base station. The pseudo base station can fraudulently use any number to send information, and it can pretend to be CCB today and ICBC tomorrow, which is not a system vulnerability of CCB, but a new way of fraud. If you click on the link and enter the card information, it is equivalent to leaking it to **, which is very dangerous.

If you receive an unknown link, don't click on it, and confirm with the bank first.

in a building; Cable television; monitoring systems; floor calls; Signal system systems and so on belong to the scope of communication construction.

Communication construction technology exchange 176922584