Does the ruler absorb water?????

Water molecules are going to go into the size.

1. Open AutoCAD on your computer and click Annotation in the toolbar.

2. After clicking to open the annotation, you can see various annotation tools, that is, the ruler tool.

3. Select Quick Annotation, click on the straight line, and then use the mouse to drag out the annotation directly.

4. Or you can directly call up the annotation floating window.

1.Right-click in the blank space of the title, and then click CAD, there is a query in it, click it, and the ruler will come out. 2.Click on the "Label" menu, there are various rulers.

Command: dist and then specify the first point and then the second point, you can measure the x increment and y increment between the two points, the area measurement command is area, etc.

The answer I gave you should be encouraged!

In the "Annotation" menu on the CAD, you can use various rulers: measuring line length, measuring angles, etc. Go and see!

I'll teach you the simplest one:

Open all the CAD tools and look for them one by one

Or you don't have a long memory!!

Okay to die!!

Inside Tool 2!!

This is a tower ruler and is used for engineering surveys.

A tower ruler is a type of leveling ruler. Most of the early levels were made of wood, which was heavy and limited in length (generally 2 m), making it difficult to carry when measuring. After gradually using aluminum alloy and other light and high-strength materials made, high-precision indium steel material, using tower shrinkage form, easy to extract when in use, the single elevation measurement range is greatly improved, the length is generally 5m, it can be contracted when carrying, because its shape is similar to the tower, so it is often called the tower ruler.

The companion tool for using the ruler is the level.

Benchmarks, rulers, elevation measurements, and level measurements.

Earthworks are used to look at them with special mirrors.

What do you write with a pen, tear off the label with water and put it under the table, I have brought the ruler, and I don't need it.

You can bring it, and water is generally okay, but it depends on whether the examination room is strict or not at that time, and sometimes there may be restrictions.

Yes, drinking water is a right, the pen does not bring how to do the questions, and the ruler is also regarded as stationery.

You can bring it, but electronic devices are not allowed.

OK. I've brought them all.

If there is a 5 cm object, then there are 5 segments in the area. The ruler is to look at the number of segments, not the numbers!

Hello, dear, I'm glad to answer for you, before the Qing Dynasty, the tailoring ruler was about right, and the Qing Dynasty specification was adjusted to 35cm. The tailoring ruler is a special ruler for garment workers, and the ancient garment workers first used a wooden ruler to measure people's height, shoulder width and arm length, and then used a tailoring ruler longer than the wooden ruler to cut the material, just add the remaining material of the seam head. So the tailor uses two rulers at the same time.

The History of Chinese Weights and Measures records that the wooden ruler has been used since the change of Luban, and has not changed for more than 2,000 years.

That is, the wooden ruler is the basic scale ruler used by all craftsmen in ancient China, the Chinese meter ruler.

The most important point about the Luban ruler is that the "Luban Sutra" of the past dynasties records: the wooden diameter ruler is one foot four inches and four square feet.

Wherever you go, you can measure a few centimeters, not counting 0

Start from 0, if it doesn't count 0, what if something is only a few tenths of a centimeter???

You can use an eraser to rub it off, and when the eraser is dirty, rub it off on the white wall.

Just rub it on a blank piece of paper and you're good to go.

There should be a lot of pen on it, just wipe it with paper dipped in some toilet water

Ruler Another hallmark of Luban's invention is the ability to correctly draw a triangle at right angles, also known as a ruler, which can be inward.

Inform the craftsman which sizes are irregular and which are inauspicious according to the rules of divination (Feng Shui). These rulers are still available in Hong Kong today. Saws for the invention of the saw Luban is very important.

Or inspired by a toothed blade of grass cutting a finger, or seeing a cricket cut and eat food with its sharp teeth. Anyway, most of them are described below. Luban and the craftsmen were given a task to cut down a large amount of timber.

After several days of cutting, they were exhausted and the axes they used were dull. At this time, Lu Ban suddenly had his finger cut by a blade of grass, and he immediately thought: It must be a good way to make a tool to cut wood like this.

He chose a piece of bamboo and used an axe to cut a row of teeth at its edge. The new saw easily sawed off the bark, and as he sawed the tree back and forth, the soft teeth were quickly worn off. However, this proves the principle that sawing can break wood.

So Lu Ban put down his work and went to the blacksmith, and asked him to prepare an iron plate as hard and sharp as an axe, and then make it into a tooth shape. Luban had this first saw blade made by hand, and used it on a wooden roof truss to cut wood accurately and effortlessly.