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    Fire engines , as special vehicles used by fire services to fight fires and rescue people, are always there to protect people. However, few people know the history of fire engines. Do you know the story of the world's first fire engine?   The first fire engines in the world. The world's first recorded fire engine was built in 1518 on commission from the city of Augsburg, Germany, by the craftsman Antney Blattner, who made metalwork. Very little is known about the details of this fire engine. According to the book "History of Craftsmanship in the City of Augsburg", the fire engine was formed by mounting a large water pump operated by a lever on the vehicle. Its power was then drawn by horses.     The continuous development of  fire engines . In 1666, a fire broke out in London, England, which burned for four days, destroying 1,300 houses including the famous St Paul's Church, and some medieval buildings were swept away in the fire. People began to take f...

Disposable cups is widely used & be a very important role in our life. Sometimes in the places that people are crowded, we use disposable cups. Because it can avoid the spread of disease. it will be more safety. When we drink water or coffee, we can use it directly and we can throw it into dustbin without extra clean, so you can see it’s extremely convenient. This page will have a detailed & professional introduction of different  types of disposable cup .   What Are Disposable Cups Disposable cup is one of food packaging. It’s a small container for drinking or food. but it has very limited number of use and normally for single use. There are many types for disposable cups. it’s depends on what standard that we choose.   Types Of Disposable Cup There are many different categories for disposable cups on the market, Because the basis of classification are different, the catalog will be different. For example, if you take usage as the basis, it can be divided in...

Basic Information of  Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl 97/95/98TC Density 0.968 Boiling point 390.818ºC at 760 mmHg Flash point 2ºC Exact mass 375.04900 PSA 57.65000 LogP 4.48640 Refractive index 1.513 Storage conditions 2-8°C Water solubility 8.74 mg/L at 20 ºC   Application of Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl 97%TC is an aromatic chlorooxyphenoxypropionic acid herbicide. For the control of weeds in soybean, cotton, peanuts, canola, kale, potato, watermelon, sunflower, and etc.  Weed Control Spectrum of Haloxyfop-R-methyl 97/95/98TC Haloxyfop-R-methyl is used post-emergence for control of annual and perennial grasses. Action Mode of Haloxyfop-R-methyl 97/95/98TC Selective herbicide, absorbed by roots and foliageand hydrolysed to haloxyfop-P, which is translocated to meristematic tissues, and inhibits their growth.    About Huimeng Bio-tech Huimeng Bio-tech  is a biotechnology enterprise int...

    paper coffee filter Coffee filter paper is the most traditional one-time-use filter product. Most of the uses are used to filter coffee. Use filter coffee, which uses extremely dense fibers to retain ground coffee beans and coffee powder, and extract the extracted coffee. The coffee is strained into the cup to get a clean coffee solution. Filter paper can also filter terpene esters in coffee, which are mostly organic products of plants, and good filter paper can filter out impurities, and coffee tastes more mellow and has a more pronounced aroma. Advantages: high convenience, it can be thrown away after use, and the brand can be changed; the mouthfeel of punching is relatively clean; there are few impurities and odors. Disadvantages: less environmentally friendly use of paper; unbleached paper will have a papery smell; grease will be filtered out, resulting in a coffee taste without grease. metal coffee filter Recently, the awareness of environmental protection has become ...

    Whether you work in construction, government or entertainment,  purchasing barricades  requires some familiarity with barricade features and variations. While barricades seem standard, certain features make more or less sense depending on your specific crowd control experience. Do you need barricades that will survive outdoor weather and hard rain? Will they need to be sturdy on uneven ground? Will the crowd need an access point through the barricades? Will these barricades be permanently fixed, or will they have to be moved and stored? These are key considerations when comparing the different  barricades for sale . Here are some things to keep in mind ahead of buying steel barricades: Barricade Types: Metal barricades are categorized by the exterior coating and feet design. Barricade Compatibility: Barricades are built to last. When you need to buy more barricades, you must consider features for compatibility. Variati...

  A power divider is a device that divides the energy of an input signal into two or multiple outputs of equal or unequal energy, and can also combine the energy of multiple signals into one output in reverse, which can also be called a combination. router. A certain degree of isolation should be guaranteed between the output ports of a power divider. Power divider   is also called overcurrent divider. It is divided into active and passive. It can evenly distribute one signal into several outputs. Generally, each branch has a few dB attenuation. The signal frequency is different, and the attenuation of the divider is also different. Different, in order to compensate for the attenuation, a passive power divider is made after adding an amplifier. The technical indicators of the power divider include frequency range, withstand power, distribution loss from main circuit to branch, insertion loss between input and output, isolation between branch ports, voltage standing wave ratio ...

  Obviously, if the transmission line is not properly insulated from the support of the tower or pole, then the current will flow in the direction of the ground through the tower and thus become dangerous. Of course, the transmission line is always supported by   insulators   placed on the poles. Insulators used for towers must have high mechanical strength, high resistance, and high relative permittivity, etc.   Types of insulators These are divided into different types according to their ratings, which include the following. These are used in transmission and distribution systems, where each insulator consists of several insulating discs. If one disc uses 11kv voltage, the remaining discs use 66kv voltage.   AC Standard Glass Insulator Insulators are divided into five different main types.   Post Insulator Shackle Insulator Pin insulators Strain insulators Suspension insulators   1. Post insulators Post insulators are commonly used in substations or ...