Conventional plastic materials can be determined using the combustion method, according to whether the flammable, combustion flame, whether there are drops, whether or not the delayed combustion, odor and other phenomena to determine the following combustion phenomena for commonly used plastic mater

What is the main function of steel core aluminum stranded wire？1. Introduction of steel core aluminum stranded wireSteel-core aluminum stranded wire, abbreviated as ACSR, is a common material for overhead conductors. It consists of aluminum conductor and steel core, which is widely used in the field

Can't get online with the router, but can get online with a direct connection to the optical cat?When using the router, it can't access the Internet, but it can access the Internet when we connect computer directly to the optical cat without the router. What is going on? And how to deal with it?Firs

(A) How to install the cabinet tray?The installation of the cabinet tray only requires the use of four pins to fix it on the square hole of the cabinet corner cabinet. Specific operation: first of all, the pins will be contracted inward (Figure 1), then the cabinet tray will be flipped over and inse

Transmission line basics(a)The composition of the transmission lineThe transmission pathway is composed of power lines, substation and distribution equipment.Transmission lines from the structure can be divided into two types of overhead lines and cable lines.The main components of overhead transmission

Sea freight calculation methodForeign trade sea freight generally has two ways: the first full container sea freight calculation, full container sea freight = basic sea freight + sea freight surcharge;

The transmission rate of the Category 6 cabling system can provide high-speed bandwidth about three times higher than that of the Category 5e cable, and the ACR value is 300% higher than that of the Category 5e cable at 100MHz. In terms of construction and installation, Category 6 is much more diffi

As the value of PDUs is gradually enlarged and widely recognized, from national data centers to small and medium-sized users of a single cabinet, the choice and demand for PDUs are also different, especially small and medium-sized computer room users, a large group base, more risks and hidden danger

The small residual length of the communication fiber is the key to process control in the production process of the plastic coating process. The so-called residual length is: the difference between the optical fiber length and the loose sleeve length and the fraction of the loose sleeve length: As

Steel StrandA steel product called steel strands is created by twisting lots of steel wires together. Galvanized, zinc-aluminum alloy, aluminum, copper, epoxy resin, and other coatings can be put to the surface of carbon steel as needed. According to the number of steel wires