The former small curved light has now been replaced by bright neon lights.
Changchun street light
In 30 years, more than 10,950 days and nights, although fleeting, but Changchun has gone through the small light from the light of the light to the colorful landscape lights, climbed up and down the pole from the waistline to repair and stand It can go straight up and down on the engineering vehicle, from the 13,725 neon lights in 1978 to the huge changes in today's 86,000 lamps.
Lights, the eyes of a city. At that time, a small curved lamp that snuggled on a pole with a small wire and shook slightly in the snow and snow tried to illuminate the way home for us. Now, on the night of the light, people linger on the colorful streets and appreciate it. Beautiful night view.
In 30 years, more than 10,950 days and nights, although fleeting, but Changchun has gone through the small light from the light of the light to the colorful landscape lights, climbed up and down the pole from the waistline to repair and stand It can go straight up and down on the engineering vehicle, from the 13,725 lamps in 1978 to the huge changes in today's 86,000 lamps.
After the light of this light, let us go back 30 years ago, to find the small street lamp in the memory that once stood on the street to illuminate our way home, and search for memories of the infinite memory that it has left us. .
[Street light maintenance]
Climb up and down to
Standing on the car, you can repair
Song Tiezhu, secretary of the Street Light Management Office of Changchun City, has worked in the street lighting management office of Changchun for 39 years.
I still remember that when I joined this group, the handsome Song Tiezhu was still a young guy. I was a worker at that time. It was really not easy to repair the streetlights at that time. The poles were not the same size. I had a safety rope on my waist and climbed up and down the poles. It was very hard and rainy. Talking about 30 years ago, Song Tiezhu was very emotional. The streetlight poles of the year were all wooden poles. Even if they were wearing gloves, they could be tied to the hand. It was not only difficult to repair, but also very time consuming.
The streetlight poles of the year were made of wood. Because part of the poles were below the ground, an anti-corrosion treatment was done every year, otherwise it would rot. Song Tiezhu said that the deeper parts below the ground will not rot, mainly the location closer to the ground. Today, 30 years later, the poles of the main and secondary trunk roads in Changchun have changed from the original wood poles to cement rods, the cement rods become iron rods, and the iron rods have become stainless steel seamless iron rods. Zinc and spray irons. Even if it needs to be repaired, the maintenance personnel can stand up and down as long as they stand on the engineering vehicle, saving time and trouble.
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Antenk DVI Series Digital Video Interface connectors are the standard digital interface for flat panels, video graphics cards, monitors and HDTV units. This series includes DVI-D (Digital), DVI-A (Analog) and DVI-I (Integrated Digital/Audio). Their unique crossing ground blades provide high speed performance at low cost. They are available in Straight or Right Angle PCB mount receptacles and mating male cable connectors. They support a data transfer rate of 4.95Gbps with a dielectric withstanding voltage of 500VAC. Each version features our specially designed contacts which improve signal performance and a zinc alloy shield that reduces electromagnetic interference (EMI).
Digital Visual Interface Cable Connectors
DVI ConnectorWith the advent of technologies such as DVD players, high-definition televisions, and even digital cable, the need for more advanced cables and connectors has increased. Digital Visual Interface (DVI) is one response to the growing need for interconnected systems, enabling digital systems to be connected to an array of displays. Yet DVI cables and connectors can also be complicated, and may lead to confusion between High Definition Multimedia Interface (HDMI) and DVI. Although the two systems have much in common, they service different niches of digital technology.
Digital Visual Interface
Older systems aren`t necessarily outdated systems. Although DVI preceded HDMI, it`s still widely used in both business and domestic settings. DVI connectors are designed to handle digital data transmission, incorporating three transmission channels in every connector link. The maximum bandwidth for data transfer is 165 megahertz, which is enough to relay up to 165 million pixels per second. Data is encoded for effective transfer, but a single link can handle around 4.95 gigabits per second of information. Double links can handle twice that amount.
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A standard DVI Connector is 37 mm wide and has 24 pins, 12 of which are used for a single link connection. When analog is involved, four additional pins are needed to support the additional lines of an analog signal. It is not possible to cross from a digital source to an analog display or vice versa. In those instances, an integrated connector is probably the best option. There are five common types of DVI connectors.
DVI-I Single Link
This kind of connector has three rows, each with six pins. There are two contacts. Because the connector is integrated, it can be used with both analog and digital applications.
DVI-I Dual Link
A DVI-I dual link connector can also be used with both digital and analog applications, but is configured with more pins to accommodate a dual connection. There are three rows with eight pins each, as well as two contacts.
DVI-D Single Link
Specifically designed for digital applications, a DVI-D single link connector has three rows of six pins, and looks much like a DVI-I single link connector. However, a DVI-D connector has no contacts.
DVI-D Dual Link
Also made specifically for digital applications, a DVI-D dual link features more pins (three rows of eight) for dual connections. Like a DVI-D single link, a DVI-D dual link connector has no contacts.
DVI-A
This particular type of connector can only be used for analog applications, and has three rows of pins. One row has five pins, one has four pins, and the last row has three pins. Like single link connectors, a DVI-A link connector has two contacts.
Female DVI Connector
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