What does t13 mean, what does T13 mean when it is written on the road

T13A carbon tool steel is a tool steel with the standard GB T 1298 1986.

Material Name: Carbon Tool Steel.

Grade: T13

Standard: GB T 1298 1986

Features and scope of application:

T13 carbon is the steel grade with the highest carbon content among carbon tool steels, with extremely high hardness and the best wear resistance, but low mechanical properties and cannot be impacted. T13 carbon tool steel is suitable for the manufacture of tools that are not subject to vibration and require extremely high hardness, such as razors, scrapers, files, lettering tools, wire drawing tools, drill bits and tools for hard rock processing.

Chemical composition: Carbon C: 1 25 1 35

Silicon si: 0 35

Manganese mn: 0 40

Sulfur s: 0 020

Phosphorus p : 0 030

Chromium Cr: Promised residual content 0 25, 0 10 (in the manufacture of lead bath quenched steel wire) Nickel Ni: promised residual content 0 20, 0 12 (in the manufacture of lead bath quenched steel wire) Copper Cu:

Promised residual content 0 30, 0 20 (when manufacturing lead bath quenched steel wire) Note: Promised residual content cr ni cu 0 40 (when manufacturing lead bath quenched steel wire) Mechanical properties: hardness:

annealed, 217HB, indentation diameter 4 10mm; Quenched, 62hrc

Heat treatment specifications and metallographic structure:

Heat treatment specification: specimen quenching 760 780, water cooling.

Delivery Condition: The steel is delivered in annealed condition. By agreement between the two parties, it can also be delivered without annealing.

In terms of the level of the Paralympic Games, in the category of visual impairment, level 11 is total blind or near total blindness; Level 13 is the minimum standard for visual disability. Class 11 races require a frontrunner and wear an eye patch, while Class 12 runners can also require a frontrunner, while Level 13 is the least disabled level (in fact, it can be understood as super high myopia).

Summary. Pro, the measured points usually need to be used in the city, such as making maps, planning urban construction, building roads, etc. In order for these points to be used in the city, they need to be converted into measurement coordinates.

Specifically, it is necessary to use measurement methods (e.g., total station, theodolite, etc.) to measure the point, obtain its three-dimensional coordinates (longitude, latitude, elevation), and then convert it into the coordinate value of the city coordinate system (such as the planar Cartesian coordinate system or the Gauss-Krüger projection coordinate system) for easy use in the city. When performing coordinate conversion, it is necessary to consider factors such as ellipsoidal height, geoid height, and projected coordinate system to ensure the accuracy of coordinate conversion.

What does that mean.

Hello dear, this is the measurement point used for measurement, the letter sprayed by yourself.

What do you mean, no one for half a day.

That's a measurement or something.

Is there a way to cross from here or something.

The points measured by Shichang usually need to be used in the city, such as making maps, planning urban construction, building roads, etc. In order for these points to be used in the city with empty return bases, they need to be converted to survey coordinates. Specifically, it is necessary to use measurement methods (e.g., total station, theodolite, etc.) to measure the point, obtain its three-dimensional coordinates (longitude, latitude, elevation), and then convert it into the coordinate value of the city coordinate system (such as the planar Cartesian coordinate system or the Gauss-Krüger projection coordinate system) for easy use in the city.

When performing coordinate conversion, it is necessary to consider the height of the ellipsoid, the height of the geoid and the projected coordinate system to ensure the accuracy of the coordinate conversion.

Hello dear, the road sign next to the highway writes "T13" is a load limit warning sign, T13 means that the single axle weight of the car shall not exceed T13, that is, not more than 13 tons. Hazards of overloading vehicles: Overloading of vehicles has severely damaged highway infrastructure.

Because the load of overrun and overloaded vehicles far exceeds the design load of highways and bridges, the road surface is damaged, the bridge is broken, and the service life is greatly shortened. The vehicle is overrun and overloaded, the mass increases and the inertia increases, the braking distance and the additive beam are long, and the danger of danger and closure increases. If it is seriously overloaded, it will cause accidents such as tire bursts, sudden deviations, brake failures, and rollovers due to excessive tire load and excessive deformation.

In addition, overloading will also affect the steering performance of the vehicle, and it is easy to cause accidents due to uncontrolled steering. Drivers driving overloaded vehicles often increase the psychological burden and ideological pressure, and are prone to operational errors, affecting driving safety and causing traffic accidents. Due to the fact that the vehicle after overloading and overloading cannot reach the normal speed, it occupies the lane for a long time, which directly affects the smooth flow of the road.

1. What does T1 mean: T1 is the abbreviation of Tier (suit) 1, and each veteran has his own career suit.

2. Related introduction: 60 nostalgic 40 large copies of the first contact, producing T1 and T2 sets. The former is from the first large 40-player raid Molten Heart (MC), and the latter is from the second large 40-player raid Blackwing's Lair (BWL) right after the MC.

T1 and T2 follow the naming convention of the T0 (D1) set, and also have the effect of a 3 5 8 piece set.

T+1 refers to the trading time, and the T in it refers to the day of your ****, and +1 is to add one day.