Our daily sprinklers are mainly used for watering roads or roads. Actually, sprinklers can be divided into many different types. Different kinds of sprinklers are not the same, and their effects are very different. The job sprinkler must have been heard by many people. Let's take a look at it today.   Like many other sprinklers, high-altitude sprinklers can not only act on the cleaning and cleaning of various types of roads, but also on the roads and surrounding areas, as well as the irrigation of trees and trees in parks, etc., as well as the construction of factories and mines and high-altitude buildings. Rinsing etc. In some more special occasions, such as areas where fires occur, sprinklers also have the function of fire trucks. They have the functions of water transport, drainage, and emergency fire fighting. The fences around the city are more difficult to clean and can also be used with water trucks. Clean, sprinklers can spray pesticides. The high-altitude sprinkler can be divided into two types: high-level spraying and low-level spraying. Different sprinkler modes need to be selected according to different sprinkler environments.    The effective volume of the sprinkler tank for aerial work : 5.88 cubic meters; the dimensions of the tank (long/long axis/short axis) (mm): 4600/1800/1000. The sprinkler can not only be sprinkled forward and sprinkled, but also has the function of side spraying. The rear working platform can also be installed with green sprinkler pressure guns. The high pressure gun can be arbitrarily adjusted to light rain, moderate rain, heavy rain, drizzle and other modes to meet different greening requirements. Sprinkling needs.    Because the high-altitude operation sprinkler also has the function of fire fighting, the sprinkler truck is equipped with a joint for fire fighting, a self-flow valve and a self-priming function. The dust in the air can also be cleaned.    The body of the sprinkler car is oval or square, and the high-quality carbon steel plate used by Wuhan Iron and Steel Co., Ltd. during production is not only not eroded by water, but also has certain anti-wave and anti-dust effect. The outside of the tank can also be installed with insulation by using foam or rock wool, which can play a role in insulation.  The tandem bicycle or twin is a form of bicycle (occasionally, a tricycle) designed to be ridden by more than one person. The termtandem refers to the seating arrangement (fore to aft, not side by side), not the number of riders. A bike with two riders side by side is called a sociable. Tandem Beach Cruiser Bikes, Beach Tandem Bike, Tandem Beach Bicycle Hangzhou Datasports Equipment Co.,Ltd(Oembicycle) , https://www.oembicycle.com
Patents related to tandem bicycles date from the late 1890s.In approximately 1898, Mikael Pedersen developed a two-rider tandem version of his Pedersen bicycle that weighed 24 pounds, and a four-rider, or "quad", that weighed 64 pounds. They were also used in the Second Anglo-Boer War. Tandem popularity began to decline after WWII until a revival started in the late sixties. In the UK The Tandem Club was founded in 1971, new tandems came on to the market from the French companies Lejeune and Gitane, and in the USA Bill McReady founded Santana Cycles in 1976. Modern technology has improved component and frame designs, and many tandems are as well-built as modern high-end road and off-road bikes.
Tandems can have more than 2 riders - tandem refers to the arrangement of the riders one behind the other rather than the number of riders. Bicycles for three, four, or five riders are referred to as "triples" or "triplets", "quads" or "quadruplets", and "quints" or "quintuplets" respectively. One such familiar to UK TV viewers was the "trandem" ridden by The Goodies. Originally a 2-man tandem with an extra "dummy" seat attached, a full 3-man version was built for them by Raleigh.
Some designs such as the DaVinci can allow independent pedaling through the use of multiple freewheels. [4] In another design, the rear rider steers and propels the rear wheel with pedals, and the front rider propels the front wheel with both hands and feet.