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. When a message is encoded, keys and values are linked into a byte stream. When a message is decoded, the parser needs to skip the fields that it cannot recognize. In this way, new fields can be added to a message without interrupting the old program that does not know the new fields. The key in each key-Value Pair actually contains two values-the field numbers from the. proto file, and a type used to provide sufficient information to determine the next value length. The available

Many Fans surf through self-built proxy servers, hubs, switches, routers, and other devices at home. Many terminals and network devices are required for most home computer networks. In addition, the network structure is simple and computer network wiring may be ignored. PairFor Fans of wireless networks, network cabling is not a concern for the time being. However, the wired network is flexible and secure for economic, compatibility, and transmission speed considerations. Next, let's talk about

, petrochemical, pharmaceutical, environmental protection and other industries, for the removal of entrained in the industrial gas of the tiny fog, for the diameter of 3-5 micron droplet, the overall mist removal efficiency of more than 98%. Usually used in the material of the screen de-foaming device stainless steel (304, 304L, 316, 316L, etc.), pp (polypropylene), PTFE (PTFE), nickel wire, titanium wire,

The ninth story of fence home decoration-electrical and electrical materials It is not easy for programmers xdjm to buy a house. It has been laid by a developer or a second-hand house, and cannot be swallowed up by an installer, a building material dealer, a furniture dealer, or a soft contractor. We need to arm ourselves with knowledge and fight together with js to the end. Let's take a look at the fence home decoration series compiled by Leng Shan. PDF: http://download.csdn.net/source/1726999

The charging switch can be used as a control circuit to disconnect and close the switch and as a charging interface. It can be installed on a mobile platform or robot for ease of use! Start production.Prepare required materials Appendix No. Part name Quantity Remarks 1 Long red wire 2 Length: 240 2 Red short Wire 1 Length: 120 3 Black

Many users surf through self-built proxy servers, hubs, switches, routers, and other devices at home. Many terminals and network devices are required for most home computer networks. In addition, the network structure is simple and computer network wiring may be ignored. For Fans that use wireless networks, network wiring is not required. However, the wired network is flexible and secure for economic, compatibility, and transmission speed considerations. Next, let's talk about the home wiring ex

distance of 550 meters using Singlemode and multimode fiber (62.5 and 125um) multimode fiber connections. The maximum distance between single-mode fiber connections is 3000 meters. The 4b/5b encoding method is used in the transmission, and the signal frequency is 125MHz. It uses a MIC/FDDI connector, ST Connector or SC Connector. Its maximum segment length is 150m, 412m, 2000m, or up to 10 km, which is related to the type of fiber and mode of operation used, and it supports full-duplex data tra

One, what is "bread board"?1. Structure of bread plateThe breadboard is the "Integrated Circuit Experimental Board", which is a plug-in board, which has several small "sockets (holes)" on the board. In the circuit experiment, can according to the circuit connection request, in the corresponding holes inserts the electronic component's pin and the wire and so on, causes it to contact with the hole inside the elastic contact Reed, thus joins the necessa

represents the logic 1, if the voltage between the +3v~+15v represents the logic 0, in the control signal line if the voltage between -3v ~-15v indicates the disconnection state. If the voltage between +3v ~+15v indicates the on state.Voltages between -3v ~+3v and below -15v, above +15v, are meaningless.The CPU and the terminal are used TTL level and the positive logic, TTL level with the 1,0v of the logic is represented by the logic 0. They are incompatible with the level and negative logic us

telephone line and power line cannot be too close to the twisted pair wire to avoid interference with the twisted pair wire, but it should not be too far away. Keep the relative position around 20cm. 2. Focus on appearanceHome wiring pays more attention to appearance. Therefore, cabling construction should be carried out at the same time as during decoration. Try to bury the cable pipe trough under the flo

message is encoded, keys and values are linked into a byte stream. When a message is decoded, the parser needs to skip the fields that it cannot recognize. In this way, new fields can be added to a message without interrupting the old program that does not know the new fields. The key in each key-value Pair actually contains two values-the field numbers from the. proto file, and a type used to provide sufficient information to determine the next value length. The available

. ② Avoid electric shock protection identification should pay attention to prevent electric shock protection, after the lamp is powered on, people should not touch charged parts, there is no danger of electric shock. If you are buying incandescent lamps (such as chandelier and Wall lamps), install the bulbs. If the power is no

wire types to combinatorial logic, but also to map reg types to sequential logic. In fact, the two concepts will intersect. In other words, wire types are most likely to be synthesized into combinatorial logic and may be integrated into timing logic, as is the case with Reg types.What is ' Reg '? "The most Microsoft answer is: the registry file. This nature is true, but it violates the principle of "to whi

IEEE and 10GEA (Gigabit Ethernet Alliance) are the two most important organizations in Gigabit Ethernet standardization.Gigabit Ethernet standards and specifications are many, in the standard, the first 2002 years of IEEE 802.3ae, and then continue to have a new Gigabit Ethernet specification, such as the 2006 IEEE 802.3an Standard (10GBASE-T) on the introduction of twisted-pair copper wire-based Gigabit Ethernet specification , the same IEEE 802.3aq

installation of unshielded twisted pair, the grounding requirements are not high, can be connected with the cabinet of the main groove ground. 7, the specifications of the wire groove is to determine: the cross-section of the wire groove left 40% of the surplus for expansion, Super 5-type twisted-pair cross section area of 0.3 square centimeters. Groove installation, should pay attention to the isolation

electronic and electrical systems may also cause electromagnetic interference. If the system is designed to withstand electromagnetic threats in the operating environment and does not emit electromagnetic radiation that exceeds the specified level, the system design complies with the electromagnetic compatibility standards. To protect each device from any electromagnetic interference, the cost will be very high. This is the first step in the design to determine the level of protection required

The shielded cabling system is still quite useful, so I studied the techniques for blocking the module on the terminal of the cabling system and explained the details that need to be paid attention to in the practical application process from various aspects, I hope this article will be helpful to you. I. Basic principles of the twisted pair end connection module of the shielded Cabling System There are many shielding methods for shielded twisted pair wires. However, no matter which shielding m

Many users surf through self-built proxy servers, hubs, switches, routers, and other devices at home. Many terminals and network devices are required for most home computer networks. In addition, the network structure is simple and computer network wiring may be ignored. For Fans that use wireless networks, network wiring is not required. However, the wired network is flexible and secure for economic, compatibility, and transmission speed considerations. Next, let's talk about the home wiring ex

ensure that the signal line is completely separated from the power line. 3. The analog control signal line should use double stranded shielded wires. The wire specification is 0.5 ~ 2mm2. Required during WiringNote that the cables should be as short as possible (about 5-7mm). At the same time, insulation adhesive tape should be used to pack the shield layer after the cables are stripped to prevent interference from the contact with other devices. 4.

Understanding home network cabling is still very useful, so I have studied the principles and precautions for home network cabling. I would like to share with you here and hope it will be useful to you. Many users surf through self-built proxy servers, hubs, switches, routers, and other devices at home. Many terminals and network devices are required for most home computer networks. In addition, the network structure is simple and computer network wiring may be ignored. For Fans that use wireles