EBC large miner

1. There's no ranking list... It's just for you to push your own... Xintong's seems to be OK, and there's a small manufacturer, Qingzhou Fangyuan, which is better used by friends nearby. Xiangyang and Qingzhou are both big procers of slag raking machines, but the quality is uneven. Be careful with re-election.

2. The famous British brand EBC high-performance brake leather
the British EBC company was founded in 1978, directly under the British Freeman automobile group. At present, it has three factories all over the world, and its sales network covers every corner of the world, with an annual turnover of more than 100 million US dollars
the British EBC brake pads are all imported with original packaging, with the largest number of specifications and models in the world. They are widely used in many fields, such as cars, trucks, motorcycles, mountain bikes and instrial brakes

the yellow leather for EBC events has been widely used in different events, and can also be used for general use, which is highly praised by users
features: very low degree of damage, little powder, rable, high temperature resistance 850 ℃

red leather of EBC high performance series is suitable for high horsepower and drive off applications, such as Subaru and Evo
with ceramic composition, it can withstand high temperature of 750 ℃

EBC high performance series green leather is popular in Europe and the United States and highly praised
excellent materials are used to improve the braking effect. Temperature: 600 ℃, no damage to dish, less powder

the new UltimaX r90 series is a comprehensive replacement proct of EBC, which adopts the first-class quality af42 / 66 brake material mixed formula and meets the ECE r90 brake safety standard
most of them have been equipped with EBC unique brake in coating, which improves the original brake performance and is the most economical choice for all models.

3. How many days
generally 300-500 a day.

4.

Three pin EBC connection of 550 triode:

1.1 pin = e (emitter, the one with arrow), as shown in the figure:

extended data

triode, the full name should be semiconctor triode, also known as bipolar transistor and crystal triode, It is a kind of semiconctor device to control current. Its function is to amplify weak signal into electrical signal with larger amplitude. It is also used as contactless switch

crystal triode is one of the basic components of semiconctor, which has the function of current amplification and is the core component of electronic circuit. Triode is to make two PN junctions which are very close to each other on a semiconctor substrate. The two PN junctions divide the whole semiconctor into three parts. The middle part is the base region, and the two sides are the emitter region and the collector region. There are two kinds of arrangements: PNP and NPN

5. In e-commerce, Internet enterprises rapidly combine the resources of different enterprises in different regions into a unified business entity beyond space constraints through Internet extranet, intranet, VPN and other network means and business operation rules, so as to launch high-quality and low-cost procts and services at the fastest speed. E-commerce is an advanced stage of e-commerce application. In short, RFID technology is to replace bar code with electronic tags as the identification technology of goods. Compared with the passive manual reading mode, RFID has obvious advantages. It is a non-contact automatic identification technology, which can automatically read a lot of tag information instantly. RFID is not a new technology, but its application in the retail and logistics instry will have a far-reaching impact - perhaps in the near future, when customers choose a truck full of goods to go to the supermarket export, they will no longer need any barcode scanning, and the accounts payable will be clearly displayed on the screen. With the support of RFID technology, an electronic reading device, an electronic tag, an antenna and a background management system, the cumbersome charging process becomes very simple. Moreover, RFID technology makes reasonable proct inventory control and intelligent logistics technology possible. With the help of electronic tags, real-time monitoring of raw materials, semi-finished procts, finished procts, transportation, warehousing, distribution, shelves, final sales and even return processing can be realized. For example, through RFID technology, operators can know the shelf condition in real time and replenish goods quickly, recing the safety stock by 10% to 30%, thus greatly recing the storage cost. The improvement of automation and the rection of error rate make the whole supply chain management transparent and efficient. What will RFID bring to mobile e-commerce. At that time, mobile e-commerce was a surprise for operators. But in order to make this cake bigger, operators still need to invest some enthusiasm and effort, such as network bandwidth, connection quality, profit model and profit distribution of instrial chain, security system, etc. As long as the future combination of mobile e-commerce and RFID is effectively solved in reliability, ease of use, quickness and cooperation with retail enterprises, mobile e-commerce will achieve great development.

6. B is greater than ten? So what? Shouldn't your numbers be one digit? More than ten is a double-digit number. How to do it? Is the punctuation of the question not clear, or would you take a picture of the original question and send it?

7. It is a basic skill for beginners of electronic technology to judge the type and pin of triode with multimeter. In order to help readers master the method of measuring and judging quickly, the author sums up four pithy sayings: "three reversed, find the base; PN junction, fixed tube type; With the arrow, the deflection is large; Don't know. Move your mouth. " Let's explain it sentence by sentence< As we all know, a triode is a semiconctor device with two PN junctions. According to the different connection modes of the two PN junctions, they can be divided into NPN type and PNP type triodes of different conctive types. The ohmic gear of the multimeter should be used to test the triode, and R should be selected × 100 or R × 1K gear. Suppose we don't know whether the transistor under test is NPN or PNP, and we can't tell which electrode each pin is. The first step of the test is to determine which pin is the base. At this time, we take any two electrodes (for example, the two electrodes are 1 and 2), use the two probes of the multimeter to measure its forward and reverse resistance upside down, and observe the deflection angle of the needle; Then, take 1 and 3 electrodes and 2 and 3 electrodes, measure their forward and reverse resistance respectively, and observe the deflection angle of the needle. In the three reverse measurements, there must be two similar results: in the reverse measurement, the first deflection of the needle is large, and the second deflection is small; The remaining one must be reversed. The deflection angle of the pointer before and after measurement is very small. This time, the unmeasured pin is the base we are looking for< Second, we can determine the conctive type of the transistor according to the direction of the PN junction between the base and the other two electrodes. The black probe of the multimeter contacts the base electrode, and the red probe contacts either of the other two electrodes. If the pointer deflection angle of the meter head is large, it means that the measured triode is NPN type; If the deflection angle of the indicator is very small, the measured tube is PNP type< The other two electrodes, which are collector C and emitter e, are found? In this case, we can determine the collector C and emitter e by measuring the penetration current ICEO 1) For NPN transistor, the measurement circuit of through current is shown in Figure 3. According to this principle, the positive and negative resistances rce and rec between the two poles are measured upside down with the black and red probes of the multimeter. Although the deflection angle of the pointer of the multimeter is very small in the two measurements, careful observation shows that there will always be a slightly larger deflection angle. At this time, the flow direction of the current must be: Black probe → C pole → B pole → e pole → red probe, The current flow direction is exactly the same as that of the arrow in the triode symbol ("along arrow"), so the black pen must be connected with collector C, and the red pen must be connected with emitter E 2) For PNP type triode, the principle is also similar to NPN type. Its current flow direction must be: black pen → e pole → B pole → C pole → red pen. Its current flow direction is also consistent with the arrow direction in the triode symbol, so at this time, the black pen must be connected with emitter e, and the red pen must be connected with collector C< 4. If it is difficult to distinguish between the two measurements before and after the reversal, it is necessary to move the mouth. The specific method is as follows: in the two measurements of "along arrow, large deflection", hold the joint of two probes and pins with two hands respectively, hold (or use tongue against) base electrode B with mouth, and still use the discrimination method of "along arrow, large deflection" to distinguish open collector electrode C and emitter E. The human body acts as a DC bias resistor to make the effect more obvious.

8.

As shown in Figure 4: NPN, use your finger as a biasing resistor to give B a positive biasing. When the pointer deflects once, the black pen contacts the foot, which is the C pole

PNP, use your finger as a biasing resistor to give B a negative biasing, the pointer deflects once, and the red pen contacts that foot is the C pole