Die pakket bevat toestelle vir die fabriek se rooktoetse.

In Afrikaans every definite noun phrase normally takes its own die. That’s why you see:

• die pakket (“the package”)
• die fabriek se rooktoetse (“the factory’s smoke tests”)

Afrikaans uses the particle se after the possessor, rather than an apostrophe-s. Structure:
[Definite article] + [possessor noun] + se + [possessed noun]
So die fabriek se rooktoetse literally means the factory’s smoke tests.

bevat is the present‐tense verb “contains.” In Afrikaans (unlike English with -s in he contains):

• The present tense is the same for all persons (ek, jy, hy/sy, ons, julle, hulle).
• There is no extra ending for singular or plural.

Afrikaans plurals generally use -e or -s. For toestel (device):

1. The vowel in the stressed syllable is short, so the final consonant doubles: -l → -ll.
2. You add -e: toestel → toestelle.

rooktoets is a compound (smoke + test). In Afrikaans compounds ending in -toets take -e for the plural, not -es. So:
rooktoets → rooktoetse.

Most noun compounds are written as one closed word. Hyphens are used sparingly, usually only to avoid confusion or in certain foreign-word imports. Standard compounds like rooktoetse stay closed.