خزانة الأمتعة والدليل الصوتي والتصوير بالفلاش في كتيب المتحف.

It is more natural as a heading, list entry, or brochure label than as a full sentence.

Arabic often uses short noun phrases in signs, menus, brochures, and tables of contents without stating a verb like there is / there are. So this phrase is likely naming topics or services mentioned in the museum booklet rather than giving a full everyday sentence.

If someone wanted a fuller sentence, they might say something like تجد معلومات عن ... في كتيب المتحف (you find information about ... in the museum booklet).

This is an iḍāfa construction, often called a genitive construction or noun-noun construction.

• خزانة = cabinet / locker / storage
• الأمتعة = the luggage / baggage

Together, خزانة الأمتعة means something like luggage storage, baggage locker, or left-luggage depending on context.

In an iḍāfa:

• the first noun does not take ال
• the second noun often defines or specifies the first noun

So خزانة الأمتعة is not الخزانة الأمتعة.

Because in an iḍāfa, the first noun normally cannot take الـ.

Definiteness is determined by the second noun:

• خزانة أمتعة = a luggage locker / luggage storage
• خزانة الأمتعة = the luggage locker / the luggage storage

Since الأمتعة is definite, the whole phrase becomes definite.

The same thing happens in كتيب المتحف:

• كتيب has no الـ
• المتحف is definite
• so the whole phrase is definite: the museum booklet

Because the head noun is describing a type of thing, not counting many of them.

This is similar to English expressions like:

• luggage locker
• baggage claim
• shoe store

The first noun can be singular even when the second idea is plural or collective. So خزانة الأمتعة does not mean there is only one piece of luggage; it names the service or place.

الدليل الصوتي is noun + adjective, not iḍāfa.

• الدليل = the guide
• الصوتي = audio / sound-based

So الدليل الصوتي means the audio guide.

A good way to tell:

• In noun + adjective, the adjective usually matches the noun in definiteness, gender, and number.
• Here both words are definite: الدليل and الصوتي.

By contrast, in an iḍāfa like خزانة الأمتعة, the first word does not take الـ.

So:

• خزانة الأمتعة = iḍāfa
• الدليل الصوتي = noun + adjective

Because Arabic commonly uses the preposition بـ to express with / by means of.

So:

• التصوير = photography
• بالفلاش = with flash

Together: التصوير بالفلاش = flash photography / photography using flash

This is a very natural Arabic pattern. The بـ is doing real grammatical work here.

Also, فلاش is a borrowed word in Arabic, and it is very common in modern usage.

Arabic often uses و very freely in lists.

Here it connects the items:

• خزانة الأمتعة
• والدليل الصوتي
• والتصوير بالفلاش

This is normal Arabic style. English sometimes prefers commas and only one and, but Arabic commonly repeats و before each added item.

This is another iḍāfa construction:

• كتيب = booklet / brochure
• المتحف = the museum

So كتيب المتحف means the museum booklet or the museum brochure.

Again, the first noun كتيب does not take الـ, because it is the first part of an iḍāfa. The definiteness comes from المتحف.

Most naturally, it applies to the whole list.

So the sense is that these items or topics are in the museum booklet. Arabic often places a prepositional phrase like في كتيب المتحف at the end, and it can scope over the whole series, not just the nearest word.

That is especially likely here because the phrase looks like a brochure heading or contents-style line.

Because of sun letters and moon letters.

In writing, the article is always الـ, but in pronunciation the l sound changes before certain letters.

Examples from this phrase:

• الدليل is pronounced ad-dalīl because د is a sun letter
• الصوتي is pronounced aṣ-ṣawtī because ص is a sun letter
• التصوير is pronounced at-taṣwīr because ت is a sun letter
• المتحف keeps the l sound: al-matḥaf, because م is a moon letter
• الفلاش keeps the l sound: al-flāsh, because ف is a moon letter

So the spelling stays the same, but the pronunciation changes depending on the next consonant.

Because normal Arabic writing usually omits short vowels and case endings.

So in everyday print, you see:

• خزانة
• الدليل
• التصوير
• كتيب

without the full set of vowel marks.

Learners have to infer the pronunciation from vocabulary and grammar. In something like a heading or list, case endings are especially likely to be left unwritten and even unpronounced in pause.

So this is completely normal written Arabic, not an exception.