Обрамление включает узкий кант.

Обрамление means framing, trim, border, or surrounding decorative edging, depending on context.

In this sentence, it most likely refers to some kind of border design or decorative frame around an object, picture, fabric element, etc.

It is a normal Russian noun, but it is a bit more formal or technical than a very basic everyday word like рамка (frame).
So:

• рамка = a frame, often a physical frame
• обрамление = the framing/border/ornamental edging

It comes from the verb обрамлять / обрамить = to frame, to surround with a border.

Включает is from включать, which usually means to include.

So Обрамление включает узкий кант literally means:

• The border/framing includes a narrow edging

This is a very typical Russian way to describe the components or features of something.
You will often see:

• модель включает... = the model includes...
• комплект включает... = the set includes...
• дизайн включает... = the design includes...

So here, the sentence is saying that the framing/border has or contains as one of its elements a narrow кант.

Because it is the thing that includes something.

Russian sentence structure here is straightforward:

• Обрамление = subject
• включает = verb
• узкий кант = direct object

So grammatically:

• The framing includes a narrow edging

This is similar to English. Russian often allows flexible word order, but in this sentence the word order is quite neutral and standard.

Because узкий кант is the direct object of включает, and with an inanimate masculine noun, the accusative singular looks the same as the nominative singular.

Here is the breakdown:

• кант = masculine singular, inanimate
• nominative: узкий кант
• accusative: узкий кант

Since включать takes a direct object in the accusative, we expect accusative here.
But because the noun is inanimate masculine, the form does not change.

Compare:

• Я вижу стол = I see the table
  (стол stays the same in accusative)

But with an animate masculine noun:

• Я вижу брата = I see my brother
  (accusative changes form)

So in your sentence, the grammar is accusative, even though it looks like nominative.

Кант is a somewhat specialized word. It usually means a trim, edge band, piping, edging, or border strip.

It is often used in contexts like:

• clothing
• upholstery
• textiles
• furniture
• design
• decorative borders

So узкий кант is something like:

• a narrow trim
• a narrow edging
• a narrow piping/border strip

The best English translation depends on context. If this is about sewing or fabric, piping or edging may fit best. If it is about visual design, border trim may be better.

Russian does not have articles like English a/an and the.

So Обрамление включает узкий кант could mean:

• The framing includes a narrow edging
• A framing includes a narrow edging
• The border includes the narrow trim

Which one is correct depends on context.

Russian relies on:

• context
• word order
• intonation
• general situation

to show whether something is definite or indefinite.

That is why learners often need to avoid translating word-for-word from English when it comes to articles.

The given order is the most neutral:

• Обрамление включает узкий кант.

But Russian word order is flexible, so other versions are possible depending on emphasis.

For example:

• Узкий кант включает обрамление.
  This would completely change the meaning: The narrow edging includes the framing — probably not what you want.

• Узкий кант обрамление включает
  This sounds unusual and marked; not a normal neutral sentence.

• В обрамление входит узкий кант.
  This is a more natural alternative meaning A narrow edging is included in the framing.

So yes, Russian word order can change, but changing it may either shift the emphasis or change the meaning entirely.

Yes, but the nuance changes.

• включает = includes
  Focuses on something being part of a set, structure, or design.

• содержит = contains
  Sounds a bit more technical or formal, and often emphasizes contents.

• имеет = has
  More general and sometimes less elegant in descriptive writing.

So:

• Обрамление включает узкий кант = the framing includes a narrow edging
• Обрамление содержит узкий кант = the framing contains a narrow edging
• Обрамление имеет узкий кант = the framing has a narrow edging

In design or technical description, включает is very natural.

Включает is:

• 3rd person singular
• present tense
• from the imperfective verb включать

So it means:

• includes
• is including (though in English we usually just say includes here)

Why singular? Because the subject обрамление is singular.

Conjugation:

• я включаю
• ты включаешь
• он/она/оно включает
• мы включаем
• вы включаете
• они включают

Even though this is present tense, in descriptive statements like this it often expresses a general fact.

The stress is:

• обрамле́ние
• включа́ет
• у́зкий
• кант

So the whole sentence is pronounced:

обрамле́ние включа́ет у́зкий кант

Stress is important in Russian because vowel reduction affects pronunciation a lot. For example, unstressed о often sounds closer to a.

Yes, it does, especially in a technical, design, catalog, or descriptive context.

It sounds like the kind of sentence you might see in:

• a product description
• a sewing/fashion description
• interior design text
• an art/design explanation

In very casual everyday speech, a Russian speaker might choose a more conversational phrasing depending on context, but the sentence itself is absolutely normal and grammatical.