Instructions for using pre embedded settlement plates in Heilongjiang settlement plate

Description :

　　Instructions for using pre embedded settlement plates in Heilongjiang settlement plate

　　Burial of settlement plate

　　(1) Dig a soil pit of about 500 × 500 × 500mm at the burial site, and level and compact the pit with 30-50mm thick yellow sand.

　　(2) Place the settlement plate flat in the pit, fill the surrounding area with yellow sand and calibrate the level with a level, and then backfill the soil to level and compact it.

　　(3) When filling, the filling should be compacted around the settlement plate first to protect the settlement. The protective sleeve should be buried 30cm away from the bottom plate.

　　(4) After the previous layer of filling material is compacted, excavate the filling material to the protective sleeve at the pre embedded position, open the pipe plug to measure the elevation of the pipe head, and the difference between the two elevations is the settlement between observations. Then connect the previous section of connecting pipe and protective sleeve, measure the elevation of the pipe head, install the pipe plug, backfill and compact, and so on. The height of the pipe head with a good pipe plug should be 3-5cm lower than the formed filling surface.

　　In the men's 1000m short track speed skating final held on the evening of February 7th, Chinese athletes Ren Ziwei and Li Wenlong won the championship and runner up respectively. Hungarian athlete Liu Shaolin, who crossed the finish line first, was ultimately disqualified due to a foul. In the TV broadcast footage, the audience can clearly see the slow motion replay of the foul process, and some netizens believe that the video was shot by "Cheetah". The topic of "Thank Cheetah" on Weibo even made it to the hot search. However, later there was a refutation of the rumor, stating that the relevant filming equipment was not a "cheetah", but a "flying cat". Currently, there is only one set of "cheetah" deployed at the National Speed Skating Oval, also known as the "ice ribbon". So what exactly is the "cheetah" that everyone is grateful for?

　　Cheetah Ultra High Speed 4K Rail Camera System

　　The full name of "Cheetah" is the ultra high speed 4K track camera system. It is not the referee system camera that everyone thinks, but a special camera equipment independently developed by the Central Radio and Television Station over the past five years, specifically used for broadcasting speed skating events.

　　As for why it has the title of "Cheetah", I believe intelligent readers should have already guessed it. The reason for this title is one word: Quick! It is reported that the speed of ordinary athletes in speed skating competitions is about 50km/h, while athletes can reach a speed of 70km/h. However, the "Cheetah" can reach a maximum speed of 25m/s, equivalent to 90km/h, without worrying about the phenomenon of not being able to catch up with athletes.

　　Cheetah "follows athletes on camera

　　Besides being fast, taking good photos is also an important task. As a device specially developed for the characteristics of speed skating competitions, the "Cheetah" also has the technical ability to capture the movements of athletes entering and exiting corners, allowing the audience to witness the athletes' style. In addition, the device can also perform acceleration, deceleration, and overtaking actions according to the needs of live streaming, thus presenting various exciting scenes in the competition more flexibly.

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