In order to strengthen the protection of marine fishery resources and promote harmonious coexistence of people and nature, the Ministry of agriculture and Rural Affairs issued the "Announcement on Adjusting the Marine Vile Sleeper fishing System" to further adjust and improve the maritime versatile fishing system.

fishing operation type

All types of operations other than fishing tools, as well as fishing auxiliary vessels for fishing vessels.

Donghai fishing time

The East China Sea area between 35 degrees north and 26 degrees north latitude is from 12:00 on May 1st to 12:00 on September 16.

The East China Sea area from 26 degrees north to 12 degrees north latitude is from 12:00 on May 1 to 12:00 on August 16.

The East China Sea Trip Tripstop, Cage Pot, Stabbing Net and lighting (Apply) fishing Barries can apply for resource of shrimp, crab, middle and upper layers of fish, middle and upper layer of fish,Special fishing permits shall be implemented by the relevant provinces' fishery authorities to report to the Ministry of agriculture and Rural Ministry.

1. Harm of children's Telescope

Like everything, it depends on how to use it.

The regular Telescope has a precision requirements.

As long as you don't stop like watching the computer all day, you will not let go of eating and drinking water, then as long as it is a regular product, there will be no disadvantages if there is no damage.

Of course, there is another premise that the operation is correct.Do not use Telescope to aim at strong light sources, like the sun.

If children or adolescents, in growth and development, whether watching TV, computer, watching a long mirror or reading, should not be too long, and it is good to stop. Of course, you can go out to see the scenery, which is better.

2. How to choose a Telescope for children

1. Try to choose refracted Telescope.The refraction mirror is easy to operate, observed intuitive, easy to maintain, long use cycle, children can easily master operating skills when using, and it is easy to find and track when watching the target.

2. The diameter of the Telescope should not be greater than 100 mm.Many enthusiasts say that trying to choose a long -caliber Telescope, which is right for senior enthusiasts for conditions and licenses, but for observation needs that only cultivate children's interest, the caliber within 100 mm is enough because it is enough because the diameter is sufficient because it is enough because it is enough because it is enough because it is enough becauseThe caliber is not just expensive, but the Telescope is heavier.From the perspective of children's physical strength, it will reduce the usage rate of Telescopes. The fun of seeking stargazing is inevitable, and equipment is inevitable.The author recommends a Telescope with a caliber of 70 to 80 mm.

3. Try to choose a product with equatorial instrument.The equatorial instrument is not only easy to operate when tracking and looking for targets. What's more important is that it has a concept of redtrayal redness. As long as you master this concept, if you need to buy any other high -level and complex Telescope in the future, it will be lightly carried by the operation.Essence

4. With a 45 -degree positive prism.At present, the astronomical Telescope on the market is mostly equipped with a 90 -degree sky mirror.In this way, the imaging of the Telescope is upside down, and the upper and lower appearances have no effect on the astronomical observation.Because the celestial bodies in the Telescope are generally spherical or a point.Astronomical observation is generally at night. During the day, the moon and occasional moon are except the sun (not using a Telescope to directly observe the sun), leaving only the nature and human landscape around us.However, natural and human landscapes are also the goals of observation. There are also a lot of pleasure in observation. As long as the refractive astronomical Telescope is added with a 45 -degree positive prism, it becomes a multi -purpose equipment for viewing the landscape. Children can also from it.Get more happiness!

5. The price of the Telescope.Combined with the current Telescope market, the refraction mirror of 100 mm and ordinary optical glass is generally between 500 yuan and 3,000 yuan according to different workmanship, accessories, and metal materials (low -end inferior products are not in this column).Higher than this price, it is relatively professional.

MoreTelescopeprice reference & gt; & gt;

6. brand.When you buy a Telescope, you must choose a brand with a wide range of sales services and the public.

1. What is the structure of speed skating knife and shoes

One of the most important equipment of the skating project is the ice knife on the feet. The structure of the ice knife of different ice skating projects is also different. Speed skating knife shoes are ice -knife shoes worn on speed skating. There are two types of short track speed skating and avenue speed skating. TheyAlthough there is a large difference in appearance, its structure is basically the same, mainly consisting of the following parts:

1. Ice knife:Speed skating emphasizes the speed of gliding, so the ice knife is long, the blade is narrow and flat, and the ice knife of the speed skating knife shoes is only fixed with the ice shoes. This structure can extend the athlete's pedal distance and allow the athlete's ankle activity to increase the amplitude of the ankle joint activity.Large, Smooth exercise.

2, knife support:The knife holder of the speed skate shoes is fixed on the soles of the shoe by two points, which can move the position of the ice knife left and right. Generally, the short -sized skate -shoe ice knife has a higher knife.It will contact the ice surface; the avenue speed skating knife shoes are low.

3. Boots:The boots of speed skating knife shoes are generally made of carbon fiber and thermal shrinkable plastic shoe shells. While reducing the quality of ice shoes, the rigidity is improved, the leg load is reduced, the stability of the support is strengthened, and the stability of the support is enhanced.efficiency.

2. What is the principle of speed skating knife shoes

The structure of the speed skate shoes and the other two types of Ice knife shoes is different, but the basic principles are the same, mainly using ice knife to pedal ice, so as to slide on the ice. The specific principle is:

As we all know, people can walk on the ground because the soles and the ground have friction. The greater the friction, the more stable people can walk.And ice skating is just the opposite, the smaller friction can make the movement smoother.After putting on Ice knife shoes, there is a layer of water in the contact position of the ice knife and the ice surface. This layer of water plays a lubrication effect, so that people can slip on the ice surface. There are several different reasons for the cause of this layer of water:

1. The theory of stress fusion

The ice knife puts a lot of pressure on the ice, which will melt the ice surface and cause a thin water layer.When a person passing by, the pressure on the ice disappears, and the part of the water layer will re -condense into ice.

2. Surface melting theory

In recent years, the physics community has had a lot of doubts about this theory.If the role of stress melted the ice surface, it is obviously unrealistic that the athlete's weight can reach at least 175 kg to provide sufficient pressure, so the pressure effect is not the main reason for the melting of the ice surface.As a result, scientists also proposed the "surface melting theory", and its intention is that the surface of the ice always has a layer of water that will not melt; the higher the temperature, the thicker the water film, it is the lubrication effect of this layer of water.This is also a saying widely recognized in the physics community.

In general, the principle of Ice knife shoes is to lubricate the water film generated by the ice knife melting the ice surface, reducing the friction between the ice knife and the ice surface, so that people can glide on the ice surface.

1. What is the flashing light?

Blasting Lights, also known as the frequent flashing light, use electronic means (such as programming single -chip microcomputer IC, etc.) to make the light source flickering slowly or quickly to play a warning.The flashing light has been used on the police car before, rarely used in the people. This kind of policeburstThe flashing Lights belong to the controlled items.It is now widely used in entertainment venues, road traffic, advertising brightening, vehicle ships, public security police and other fields.Although the state has no mandatory requirements for the installation of flashing Lights, it cannot be used in the state or city.

2. What are the uses of flashing Lights?

1. Basic role

The role of flashing is to remind and warn. For example, if you have an emergency, you need to attract the attention of others. You can explode, so others will notice you.For a simple example, it is at night when you stop the car on a high -speed car. It is happening at night. You can explode the car after the flash warning. Of course, you cannot shoot the driver's cab.During the fire, he was trapped in the house and flickered to remind people outside to save himself.Flashing can also cause dizziness. There is a certain self -rescue function. There are not many opportunities for daily use. It is useful at critical moments.

2. Modified family

With some low -frequency flashing small power decorationburstFlash lamps appear in the car supplies market, and many lovers who love modification willburstThe flashing Lights are one of the essential weapons for the car -loving modification.

3. Daily necessities

There are many LED pocket -shaped flashlights on the market, which is very suitable for enthusiasts who like wild activities.The shell of metal alloys has the function of strong light, work light, and flashes. LED is energy saving, environmental protection, long life, and convenient to use, and the continuous lighting of this flashlight is very long.It reaches 8 hours, and the work light is 19 hours, and the brightness of the work is also very bright.

1. How to use plant flowers Nutritional soil

1. How to use Nutritional soil

The Nutritional soil we bought is best to use it or disinfected before using it. Choose a Flower pot with a suitable bottom with a round hole, and install the Nutritional soil to buy it at about 1/4 of the Flower pot.Take out the plants from the previous old Flower pots and put them in. Note that the plant root system should not be injured.Then continue to add a layer of loose and thin garden soil on it, and then fix the plant and lightly fit the surface of the soil layer to fix it with the plant.

It should be noted that if the old soil is usually nutritious, the nutrition is not sufficient. You need to blend it with the new Nutritional soil in a certain percentage. You can put some sand and garden soil.The soil has improved it to a certain extent.

2. Putting Nutritional soil above or below

Generally speaking, it can be planted directly, but because it is lighter and the water retention is not strong, it is usually paved on the bottom of the Flower pot.Sometimes the loess mixing can be added because the water reservation effect of the loess is very good.But don't put too much, generally choose the texture of loose texture and fine soil.

3. Whether to water after the Nutritional soil is used

Generally speaking, it is determined according to the degree of wetness and wetness of the soil. Whether the Flower pot is wet without watering, it does not need to be poured.Remember not to pour too much, you must clean the excess water in the Flower pot, otherwise it will easily lead to rough plants.

2. How to use Nutritional soil

In the process of cultivating plants, we must pay attention to ensuring reasonable soil. Often, we will choose some nutrient soil to promote the growth and development of plants.The prepared soil can remove the old soil of the pot soil and use new nutrition soil directly.

When using the new soil directly, it is best to add some broken tiles to the bottom of the basin after removing all the old soil, then put some rotten leaves or peels, and then lay a layer of garden soil.The soil is paved on it, and the appropriate amount of water is poured. Be careful not to do too much. After two months, the soil treatment is performed in time.

If we want to keep the old soil, we can disinfect the old soil first, first remove all the old soil, use the prepared Nutritional soil as the cultivation matrix, and then add the old soil, pour in the right amount of water, keep it, keep it, keep it, and keep it.The pot soil is moist, and the flow of air can be enhanced.