Unable to answer "What are the opening hours here?" – Bographik (Copy Store) – node/13742867936 via StreetComplete 63.0:

Appointment only

Attached photo(s):
https://streetcomplete.app/p/339496.jpg

The bus stop "La Brouck" towards Liège is actually here

via StreetComplete 63.0

Chez Piou, serves sandwiches, ice creams, crêpes, waffles,...

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/339734.jpg

In context of overlay "Places" – Vacant Shop – node/4571014197 via StreetComplete 63.0:

Taverne de Trooz
Serves drinks and food

Attached photo(s):
https://streetcomplete.app/p/339733.jpg

In context of overlay "Places" – SUN7 - TROOZ (Convenience Store) – node/13711573926 via StreetComplete 63.0:

On public holidays, opens at 9am. The sign doesn't specify closing time, I assume the closing time is the same as usual

Attached photo(s):
https://streetcomplete.app/p/339498.jpg

Maison Lejeune (sells magazines, press , alcohols, lottery tickets,...)

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/339499.jpg

Buildings of "Groupe Delhez". They do window frames, roofs and solar installs.
Open 9 to 17, Monday to Friday.

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/336652.jpg

Not sure about the diameter. There are 3 connections. One is marked DN100.
The two on top are smaller.

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/336655.jpg

Unable to answer "Are these opening hours still correct?" – Maison médicale Trooz Santé (Doctor) – node/4002721044 via StreetComplete 63.0:

The building is currently abandoned. The medical house moved to Rue de Verviers 50, 4870 Trooz

There is a metal gate preventing access to the private property behind.

via StreetComplete 63.0

Attached photo(s):
https://streetcomplete.app/p/336643.jpg