zhège qìxiè hěn zhòng.

这个 is how you say this before a noun in Mandarin.

It breaks down like this:

• 这 = this
• 个 = a general classifier / measure word
• 器械 = equipment, apparatus, instrument

So the pattern is:

这 + classifier + noun

That is a very common Mandarin structure.
You usually cannot say just 这器械 in standard Mandarin; you normally need a classifier between 这 and the noun.

Yes, 个 is the general classifier, and it is extremely common.

Native speakers often use 个 when:

• the exact classifier is unknown
• they want to speak casually
• the noun can reasonably take 个 in everyday speech

With 器械, a more specific classifier may sometimes be used depending on what kind of object it is. For example, if it is clearly a machine, 台 might also be possible in some contexts. But 这个器械 is natural and understandable.

So for a learner, 个 is a safe and useful choice here.

Not always.

In this kind of sentence, 很 often does not strongly mean very. It often works more like a natural link before an adjective.

So:

• 这个器械很重 = This equipment is heavy
• It may also mean very heavy, depending on context and emphasis

Why is 很 so common here? Because a bare adjective like 重 can sound contrastive or comparative:

• 这个器械重 can sound like This equipment is heavy (as opposed to something else) or This one is heavy

So learners are usually taught to use 很 + adjective in simple descriptive sentences.

Because Mandarin adjectives can act like predicates by themselves.

In English, you say:

• This equipment is heavy

In Mandarin, you do not need a separate to be verb before an adjective:

• 这个器械很重

That is normal Mandarin grammar.

Use 是 mainly when connecting one noun to another noun, such as:

• 这是器械 = This is equipment

But with adjectives like 重, 高, 大, 贵, etc., you usually do not use 是.

So 这个器械是很重 would usually sound wrong in a basic sentence like this.

Here, 重 is an adjective meaning heavy.

In Mandarin grammar, adjectives often behave a bit like stative verbs, which is why they can directly serve as the predicate of a sentence.

So in:

• 这个器械很重

重 is the main descriptive word, and it tells you the condition or property of the subject.

It is usually pronounced zhège.

A few useful points:

• 这 = zhè with a 4th tone
• 个 is often neutral here, so it sounds like ge
• Together: zhè ge

So even though 个 by itself is often written gè, in 这个 it is very commonly neutral-toned.

That is why the pinyin is often written:

• zhège

rather than a fully stressed zhègè.

Because 重 is a character with more than one pronunciation.

Here are the two common readings:

• zhòng = heavy, weighty
• chóng = repeated, again, layered, double

In this sentence, the meaning is heavy, so the pronunciation must be zhòng.

Examples:

• 很重 = very heavy / heavy
• 重复 = repeat, repetition

So the meaning tells you which pronunciation to use.

It is a real and useful word, but it sounds a bit more formal or specialized than some other choices.

器械 is often used for things like:

• medical instruments
• gym equipment
• apparatus
• tools or equipment with a somewhat technical feel

Depending on context, other words might be more common:

• 机器 = machine
• 设备 = equipment, facilities, apparatus
• 工具 = tools

So 器械 is fine, but its nuance is more like apparatus / equipment / instrument, not just any random object.

Chinese nouns usually do not show singular or plural the way English nouns do.

The phrase 这个器械 points to one specific item, because 这个 means this one.

So in this sentence, it is understood as a single piece of equipment.

Without something like 这个, 那些, 一些, or a number, many Chinese nouns can be more neutral about number than English nouns are.

The structure is:

demonstrative + classifier + noun + adjective

More specifically:

• 这个 = this
• 器械 = equipment
• 很重 = heavy / very heavy

So the full pattern is:

subject + predicate

Here:

• 这个器械 = the subject
• 很重 = the predicate

That is a very standard Mandarin sentence pattern for describing something.

In standard Mandarin, that sounds incomplete.

After 这 or 那, you usually need a classifier before a noun:

• 这个器械
• 那个器械

So 这器械很重 is generally not the normal form.

The classifier is an important part of the grammar pattern.

Very simply:

Question:

• 这个器械很重吗？
• Is this piece of equipment heavy?

Negative:

• 这个器械不重。
• This piece of equipment is not heavy.

Notice that:

• 吗 turns a statement into a yes/no question
• 不 negates the adjective

This follows the same grammar pattern as the original sentence.